Class 11 Biology Sample Solution- 10 | Sample Papers for Class 11 Medical and Non-Medical - JEE PDF Download

 Page 1


  
 
CBSE XI  |  BIOLOGY 
Sample Paper – 10 Solution 
 
     
 
CBSE 
Class XI Biology 
Sample Paper – 10 Solution 
 
SECTION A 
 
1. It is a system of taxonomy which arranges organisms on the basis of their shared 
derived characters. 
OR 
Two botanical gardens located in India: 
? National Botanical Research Institute at Lucknow 
? Indian Botanical Garden at Howrah 
 
2. Sepals protect the flower in the bud stage. 
 
3. No. There cannot be mitosis without DNA replication. 
 
4. It shows that carbon dioxide is necessary for photosynthesis. 
OR 
Jan Ingenhousz first showed that only green parts of plants could release oxygen. 
 
5. The H-zone contains only myosin filaments. 
 
SECTION B 
 
6. Gemmae are green, multicellular, asexual buds which develop in small receptacles 
called gemma cups located on the thallus. 
Mature gemmae separate from their stalks and get dispersed by water and 
animals. On germination, each gemma gives rise to a new thallus. 
 
7. Competitive inhibitor: When the inhibitor molecules show structural similarity to the 
substrate molecules so that both compete to bind at the active sites of the enzyme, it is 
called competitive inhibitor. 
Example: Malonate resembles succinate in its structure and inhibits the action of 
succinate dehydrogenase. 
OR 
Fatty acids are organic acids with hydrocarbon chains which end in a carboxylic group 
(–COOH). Examples: Palmitic acid has 16 carbon atoms and arachidonic acid has 20 
carbon atoms. 
 
  
Page 2


  
 
CBSE XI  |  BIOLOGY 
Sample Paper – 10 Solution 
 
     
 
CBSE 
Class XI Biology 
Sample Paper – 10 Solution 
 
SECTION A 
 
1. It is a system of taxonomy which arranges organisms on the basis of their shared 
derived characters. 
OR 
Two botanical gardens located in India: 
? National Botanical Research Institute at Lucknow 
? Indian Botanical Garden at Howrah 
 
2. Sepals protect the flower in the bud stage. 
 
3. No. There cannot be mitosis without DNA replication. 
 
4. It shows that carbon dioxide is necessary for photosynthesis. 
OR 
Jan Ingenhousz first showed that only green parts of plants could release oxygen. 
 
5. The H-zone contains only myosin filaments. 
 
SECTION B 
 
6. Gemmae are green, multicellular, asexual buds which develop in small receptacles 
called gemma cups located on the thallus. 
Mature gemmae separate from their stalks and get dispersed by water and 
animals. On germination, each gemma gives rise to a new thallus. 
 
7. Competitive inhibitor: When the inhibitor molecules show structural similarity to the 
substrate molecules so that both compete to bind at the active sites of the enzyme, it is 
called competitive inhibitor. 
Example: Malonate resembles succinate in its structure and inhibits the action of 
succinate dehydrogenase. 
OR 
Fatty acids are organic acids with hydrocarbon chains which end in a carboxylic group 
(–COOH). Examples: Palmitic acid has 16 carbon atoms and arachidonic acid has 20 
carbon atoms. 
 
  
  
 
CBSE XI  |  BIOLOGY 
Sample Paper – 10 Solution 
 
     
 
8. Vital capacity is the amount of air which one can inhale and exhale with maximum 
effort. 
It is the sum of tidal volume, inspiratory reserve volume and expiratory reserve volume 
(VC = TV + ERV + IRV). 
It is higher in (i) athletes and (ii) mountain dwellers. 
 
9. Myelinated nerve fibres are found in spinal and cranial nerves, while non-myelinated 
fibres are commonly found in autonomous and somatic neural systems. 
 
10. A key is an analytical scheme for the identification of organisms based on similarities 
and differences. These keys are based on similarities and dissimilarities in characters, 
generally in a pair called couplet. Since each couplet represents a pair of contrasting 
characters, there is an option to select or classify the organism into a group. Each 
statement in a taxonomic key is referred to as a lead. Each lead describes the 
characteristic of the organism, and the group into which it is classified.  
 
11. Differences between vascular bundles in dicot stem and root: 
Dicot stem vascular bundles Dicot root vascular bundles 
? Vascular bundles are conjoint. ? Vascular bundles are radial. 
? Xylem is endarch. ? Xylem is exarch. 
? Cambium is present.  ? Cambium is absent.  
 
OR 
A - Epidermis 
B - Complementary cells 
C - Cork cambium 
D - Secondary cortex 
 
12. The double helical model of DNA was proposed by Watson and Crick. The two strands 
of DNA are described as antiparallel because they run in opposite directions, one in the 
5' ? 3' direction and the other in the 3' ? 5' direction.  
 
 
SECTION C 
 
13. The following features will be studied in sequence: 
i. Symmetry 
ii. Segmentation pattern 
iii. Presence or absence of a vertebral column 
iv. Locomotory organelles, i.e. limbs, fins and wings 
v. Internal structures such as organ-systems, i.e. digestive, circulatory, respiratory and 
reproductive systems, to know the level of organisation  
Page 3


  
 
CBSE XI  |  BIOLOGY 
Sample Paper – 10 Solution 
 
     
 
CBSE 
Class XI Biology 
Sample Paper – 10 Solution 
 
SECTION A 
 
1. It is a system of taxonomy which arranges organisms on the basis of their shared 
derived characters. 
OR 
Two botanical gardens located in India: 
? National Botanical Research Institute at Lucknow 
? Indian Botanical Garden at Howrah 
 
2. Sepals protect the flower in the bud stage. 
 
3. No. There cannot be mitosis without DNA replication. 
 
4. It shows that carbon dioxide is necessary for photosynthesis. 
OR 
Jan Ingenhousz first showed that only green parts of plants could release oxygen. 
 
5. The H-zone contains only myosin filaments. 
 
SECTION B 
 
6. Gemmae are green, multicellular, asexual buds which develop in small receptacles 
called gemma cups located on the thallus. 
Mature gemmae separate from their stalks and get dispersed by water and 
animals. On germination, each gemma gives rise to a new thallus. 
 
7. Competitive inhibitor: When the inhibitor molecules show structural similarity to the 
substrate molecules so that both compete to bind at the active sites of the enzyme, it is 
called competitive inhibitor. 
Example: Malonate resembles succinate in its structure and inhibits the action of 
succinate dehydrogenase. 
OR 
Fatty acids are organic acids with hydrocarbon chains which end in a carboxylic group 
(–COOH). Examples: Palmitic acid has 16 carbon atoms and arachidonic acid has 20 
carbon atoms. 
 
  
  
 
CBSE XI  |  BIOLOGY 
Sample Paper – 10 Solution 
 
     
 
8. Vital capacity is the amount of air which one can inhale and exhale with maximum 
effort. 
It is the sum of tidal volume, inspiratory reserve volume and expiratory reserve volume 
(VC = TV + ERV + IRV). 
It is higher in (i) athletes and (ii) mountain dwellers. 
 
9. Myelinated nerve fibres are found in spinal and cranial nerves, while non-myelinated 
fibres are commonly found in autonomous and somatic neural systems. 
 
10. A key is an analytical scheme for the identification of organisms based on similarities 
and differences. These keys are based on similarities and dissimilarities in characters, 
generally in a pair called couplet. Since each couplet represents a pair of contrasting 
characters, there is an option to select or classify the organism into a group. Each 
statement in a taxonomic key is referred to as a lead. Each lead describes the 
characteristic of the organism, and the group into which it is classified.  
 
11. Differences between vascular bundles in dicot stem and root: 
Dicot stem vascular bundles Dicot root vascular bundles 
? Vascular bundles are conjoint. ? Vascular bundles are radial. 
? Xylem is endarch. ? Xylem is exarch. 
? Cambium is present.  ? Cambium is absent.  
 
OR 
A - Epidermis 
B - Complementary cells 
C - Cork cambium 
D - Secondary cortex 
 
12. The double helical model of DNA was proposed by Watson and Crick. The two strands 
of DNA are described as antiparallel because they run in opposite directions, one in the 
5' ? 3' direction and the other in the 3' ? 5' direction.  
 
 
SECTION C 
 
13. The following features will be studied in sequence: 
i. Symmetry 
ii. Segmentation pattern 
iii. Presence or absence of a vertebral column 
iv. Locomotory organelles, i.e. limbs, fins and wings 
v. Internal structures such as organ-systems, i.e. digestive, circulatory, respiratory and 
reproductive systems, to know the level of organisation  
  
 
CBSE XI  |  BIOLOGY 
Sample Paper – 10 Solution 
 
     
 
14. The tracheids and vessels are collectively referred to as the tracheary elements.  
(a) Tracheids: The tracheids are elongated dead cells with hard lignified walls, wide 
lumen and narrow end walls. The inner walls of the tracheids have various types of 
thickenings for mechanical strength. 
(b) Vessels: They are much elongated tubes which are closed at either end and are 
formed by the union of several short, wide and thickened cells called vessel 
elements or members. 
 Each cell of the vessel elements is lignified with a large cavity and devoid of 
protoplasm. 
 The end walls of vessel elements are transverse or oblique. They are often 
completely dissolved; the condition is called a simple perforation plate. In few cases, 
there are multiple perforation plates. 
OR 
(a) Collenchyma 
(b) Xylem parenchyma 
(c) Xylem vessels 
 
15.  
i.     
Pinnately Compound Leaf Palmately Compound Leaf 
i. In a pinnately compound leaf, 
several leaflets are present on a 
common axis. 
ii. The shape of the leaflets 
appears feather-like. 
iii. The leaflet-bearing axis is the 
continuation of the petiole or 
modified mid-rib. It is 
prominent. Example: Neem 
leaves 
i. In a palmately compound leaf, 
the number of leaflets is 
attached at the common point. 
ii. The shape of the leaflets 
appears like a palm. 
iii. The leaflet-bearing axis is very 
short and represents the tip of 
the petiole. It is not prominent. 
Example: Cotton leaves 
 
ii. It is TS of the monocot stem as the vascular bundles are scattered in monocot stems 
and the phloem parenchyma remains absent in it. 
 
  
Page 4


  
 
CBSE XI  |  BIOLOGY 
Sample Paper – 10 Solution 
 
     
 
CBSE 
Class XI Biology 
Sample Paper – 10 Solution 
 
SECTION A 
 
1. It is a system of taxonomy which arranges organisms on the basis of their shared 
derived characters. 
OR 
Two botanical gardens located in India: 
? National Botanical Research Institute at Lucknow 
? Indian Botanical Garden at Howrah 
 
2. Sepals protect the flower in the bud stage. 
 
3. No. There cannot be mitosis without DNA replication. 
 
4. It shows that carbon dioxide is necessary for photosynthesis. 
OR 
Jan Ingenhousz first showed that only green parts of plants could release oxygen. 
 
5. The H-zone contains only myosin filaments. 
 
SECTION B 
 
6. Gemmae are green, multicellular, asexual buds which develop in small receptacles 
called gemma cups located on the thallus. 
Mature gemmae separate from their stalks and get dispersed by water and 
animals. On germination, each gemma gives rise to a new thallus. 
 
7. Competitive inhibitor: When the inhibitor molecules show structural similarity to the 
substrate molecules so that both compete to bind at the active sites of the enzyme, it is 
called competitive inhibitor. 
Example: Malonate resembles succinate in its structure and inhibits the action of 
succinate dehydrogenase. 
OR 
Fatty acids are organic acids with hydrocarbon chains which end in a carboxylic group 
(–COOH). Examples: Palmitic acid has 16 carbon atoms and arachidonic acid has 20 
carbon atoms. 
 
  
  
 
CBSE XI  |  BIOLOGY 
Sample Paper – 10 Solution 
 
     
 
8. Vital capacity is the amount of air which one can inhale and exhale with maximum 
effort. 
It is the sum of tidal volume, inspiratory reserve volume and expiratory reserve volume 
(VC = TV + ERV + IRV). 
It is higher in (i) athletes and (ii) mountain dwellers. 
 
9. Myelinated nerve fibres are found in spinal and cranial nerves, while non-myelinated 
fibres are commonly found in autonomous and somatic neural systems. 
 
10. A key is an analytical scheme for the identification of organisms based on similarities 
and differences. These keys are based on similarities and dissimilarities in characters, 
generally in a pair called couplet. Since each couplet represents a pair of contrasting 
characters, there is an option to select or classify the organism into a group. Each 
statement in a taxonomic key is referred to as a lead. Each lead describes the 
characteristic of the organism, and the group into which it is classified.  
 
11. Differences between vascular bundles in dicot stem and root: 
Dicot stem vascular bundles Dicot root vascular bundles 
? Vascular bundles are conjoint. ? Vascular bundles are radial. 
? Xylem is endarch. ? Xylem is exarch. 
? Cambium is present.  ? Cambium is absent.  
 
OR 
A - Epidermis 
B - Complementary cells 
C - Cork cambium 
D - Secondary cortex 
 
12. The double helical model of DNA was proposed by Watson and Crick. The two strands 
of DNA are described as antiparallel because they run in opposite directions, one in the 
5' ? 3' direction and the other in the 3' ? 5' direction.  
 
 
SECTION C 
 
13. The following features will be studied in sequence: 
i. Symmetry 
ii. Segmentation pattern 
iii. Presence or absence of a vertebral column 
iv. Locomotory organelles, i.e. limbs, fins and wings 
v. Internal structures such as organ-systems, i.e. digestive, circulatory, respiratory and 
reproductive systems, to know the level of organisation  
  
 
CBSE XI  |  BIOLOGY 
Sample Paper – 10 Solution 
 
     
 
14. The tracheids and vessels are collectively referred to as the tracheary elements.  
(a) Tracheids: The tracheids are elongated dead cells with hard lignified walls, wide 
lumen and narrow end walls. The inner walls of the tracheids have various types of 
thickenings for mechanical strength. 
(b) Vessels: They are much elongated tubes which are closed at either end and are 
formed by the union of several short, wide and thickened cells called vessel 
elements or members. 
 Each cell of the vessel elements is lignified with a large cavity and devoid of 
protoplasm. 
 The end walls of vessel elements are transverse or oblique. They are often 
completely dissolved; the condition is called a simple perforation plate. In few cases, 
there are multiple perforation plates. 
OR 
(a) Collenchyma 
(b) Xylem parenchyma 
(c) Xylem vessels 
 
15.  
i.     
Pinnately Compound Leaf Palmately Compound Leaf 
i. In a pinnately compound leaf, 
several leaflets are present on a 
common axis. 
ii. The shape of the leaflets 
appears feather-like. 
iii. The leaflet-bearing axis is the 
continuation of the petiole or 
modified mid-rib. It is 
prominent. Example: Neem 
leaves 
i. In a palmately compound leaf, 
the number of leaflets is 
attached at the common point. 
ii. The shape of the leaflets 
appears like a palm. 
iii. The leaflet-bearing axis is very 
short and represents the tip of 
the petiole. It is not prominent. 
Example: Cotton leaves 
 
ii. It is TS of the monocot stem as the vascular bundles are scattered in monocot stems 
and the phloem parenchyma remains absent in it. 
 
  
  
 
CBSE XI  |  BIOLOGY 
Sample Paper – 10 Solution 
 
     
 
16. Phyllotaxy is the pattern of arrangement of leaves on the stem or branch. This is of 
three types—alternate, opposite and whorled.  
i. Alternate arrangement of leaves: In alternate phyllotaxy, only one leaf is borne at 
each node. Examples: Hibiscus, mango, peepal 
 
ii. Opposite arrangement of leaves: In opposite phyllotaxy, a pair of leaves appear at 
each node and lie always opposite to each other. Examples: Tulsi, guava 
 
iii. Whorled arrangement of leaves: If three or more leaves are present at a node and 
form a whorl, it is called the whorled arrangement of leaves. Example: Alstonia 
 
  
Page 5


  
 
CBSE XI  |  BIOLOGY 
Sample Paper – 10 Solution 
 
     
 
CBSE 
Class XI Biology 
Sample Paper – 10 Solution 
 
SECTION A 
 
1. It is a system of taxonomy which arranges organisms on the basis of their shared 
derived characters. 
OR 
Two botanical gardens located in India: 
? National Botanical Research Institute at Lucknow 
? Indian Botanical Garden at Howrah 
 
2. Sepals protect the flower in the bud stage. 
 
3. No. There cannot be mitosis without DNA replication. 
 
4. It shows that carbon dioxide is necessary for photosynthesis. 
OR 
Jan Ingenhousz first showed that only green parts of plants could release oxygen. 
 
5. The H-zone contains only myosin filaments. 
 
SECTION B 
 
6. Gemmae are green, multicellular, asexual buds which develop in small receptacles 
called gemma cups located on the thallus. 
Mature gemmae separate from their stalks and get dispersed by water and 
animals. On germination, each gemma gives rise to a new thallus. 
 
7. Competitive inhibitor: When the inhibitor molecules show structural similarity to the 
substrate molecules so that both compete to bind at the active sites of the enzyme, it is 
called competitive inhibitor. 
Example: Malonate resembles succinate in its structure and inhibits the action of 
succinate dehydrogenase. 
OR 
Fatty acids are organic acids with hydrocarbon chains which end in a carboxylic group 
(–COOH). Examples: Palmitic acid has 16 carbon atoms and arachidonic acid has 20 
carbon atoms. 
 
  
  
 
CBSE XI  |  BIOLOGY 
Sample Paper – 10 Solution 
 
     
 
8. Vital capacity is the amount of air which one can inhale and exhale with maximum 
effort. 
It is the sum of tidal volume, inspiratory reserve volume and expiratory reserve volume 
(VC = TV + ERV + IRV). 
It is higher in (i) athletes and (ii) mountain dwellers. 
 
9. Myelinated nerve fibres are found in spinal and cranial nerves, while non-myelinated 
fibres are commonly found in autonomous and somatic neural systems. 
 
10. A key is an analytical scheme for the identification of organisms based on similarities 
and differences. These keys are based on similarities and dissimilarities in characters, 
generally in a pair called couplet. Since each couplet represents a pair of contrasting 
characters, there is an option to select or classify the organism into a group. Each 
statement in a taxonomic key is referred to as a lead. Each lead describes the 
characteristic of the organism, and the group into which it is classified.  
 
11. Differences between vascular bundles in dicot stem and root: 
Dicot stem vascular bundles Dicot root vascular bundles 
? Vascular bundles are conjoint. ? Vascular bundles are radial. 
? Xylem is endarch. ? Xylem is exarch. 
? Cambium is present.  ? Cambium is absent.  
 
OR 
A - Epidermis 
B - Complementary cells 
C - Cork cambium 
D - Secondary cortex 
 
12. The double helical model of DNA was proposed by Watson and Crick. The two strands 
of DNA are described as antiparallel because they run in opposite directions, one in the 
5' ? 3' direction and the other in the 3' ? 5' direction.  
 
 
SECTION C 
 
13. The following features will be studied in sequence: 
i. Symmetry 
ii. Segmentation pattern 
iii. Presence or absence of a vertebral column 
iv. Locomotory organelles, i.e. limbs, fins and wings 
v. Internal structures such as organ-systems, i.e. digestive, circulatory, respiratory and 
reproductive systems, to know the level of organisation  
  
 
CBSE XI  |  BIOLOGY 
Sample Paper – 10 Solution 
 
     
 
14. The tracheids and vessels are collectively referred to as the tracheary elements.  
(a) Tracheids: The tracheids are elongated dead cells with hard lignified walls, wide 
lumen and narrow end walls. The inner walls of the tracheids have various types of 
thickenings for mechanical strength. 
(b) Vessels: They are much elongated tubes which are closed at either end and are 
formed by the union of several short, wide and thickened cells called vessel 
elements or members. 
 Each cell of the vessel elements is lignified with a large cavity and devoid of 
protoplasm. 
 The end walls of vessel elements are transverse or oblique. They are often 
completely dissolved; the condition is called a simple perforation plate. In few cases, 
there are multiple perforation plates. 
OR 
(a) Collenchyma 
(b) Xylem parenchyma 
(c) Xylem vessels 
 
15.  
i.     
Pinnately Compound Leaf Palmately Compound Leaf 
i. In a pinnately compound leaf, 
several leaflets are present on a 
common axis. 
ii. The shape of the leaflets 
appears feather-like. 
iii. The leaflet-bearing axis is the 
continuation of the petiole or 
modified mid-rib. It is 
prominent. Example: Neem 
leaves 
i. In a palmately compound leaf, 
the number of leaflets is 
attached at the common point. 
ii. The shape of the leaflets 
appears like a palm. 
iii. The leaflet-bearing axis is very 
short and represents the tip of 
the petiole. It is not prominent. 
Example: Cotton leaves 
 
ii. It is TS of the monocot stem as the vascular bundles are scattered in monocot stems 
and the phloem parenchyma remains absent in it. 
 
  
  
 
CBSE XI  |  BIOLOGY 
Sample Paper – 10 Solution 
 
     
 
16. Phyllotaxy is the pattern of arrangement of leaves on the stem or branch. This is of 
three types—alternate, opposite and whorled.  
i. Alternate arrangement of leaves: In alternate phyllotaxy, only one leaf is borne at 
each node. Examples: Hibiscus, mango, peepal 
 
ii. Opposite arrangement of leaves: In opposite phyllotaxy, a pair of leaves appear at 
each node and lie always opposite to each other. Examples: Tulsi, guava 
 
iii. Whorled arrangement of leaves: If three or more leaves are present at a node and 
form a whorl, it is called the whorled arrangement of leaves. Example: Alstonia 
 
  
  
 
CBSE XI  |  BIOLOGY 
Sample Paper – 10 Solution 
 
     
 
OR 
Alimentary canal of a cockroach: 
 
 
17.   
i. The flow of metabolites at a definite rate and direction in the living body is known 
as the dynamic state of body constituents. 
ii. Adenosine triphosphate (ATP) 
iii. The protein moiety of a conjugate enzyme is called apoenzyme. 
 
18. Characteristics: 
(a) They are cylindrical-shaped cell organelles which have finger-like folds in the inner 
membrane called cristae.  
(b) Mitochondria are semi-autonomous due to the presence of their own DNA and 
ribosomes.