Class 11 Biology Sample Solution - 2 | Biology Class 11 - NEET PDF Download

 Page 1


 
 
CBSE XI |  BIOLOGY 
Sample Paper – 2 Solution 
 
     
 
CBSE 
Class XI Biology 
Sample Paper – 2 Solution 
 
SECTION A 
 
1. Cnidaria and Echinodermata 
 
2. Lateral meristem 
OR 
Epidermis – Cortex – Endodermis – Pericycle – Pith  
 
3. It enables glucose transport into cells. 
 
4. Bone marrow 
 
5. It reduces friction between the articulating bones. 
OR 
The neuromuscular junction is the junction between the motor neuron and the 
sarcolemma of the muscle fibre.  
 
SECTION B 
 
6. Phylogenetic classification systems take into account the evolutionary or phylogenetic 
relationships among various organisms. They assume that organisms belonging to the 
same taxa have a common ancestor. 
 
7. Inclusion bodies are non-membrane-bound structures lying in the cytoplasm which 
store reserve materials. 
Examples: Phosphate granules, cyanophycean granules, glycogen granules 
      OR 
Essential amino acids Non-essential amino acids 
(i) These amino acids cannot be 
synthesised in the body. 
(ii) Dietary proteins form the 
source of essential amino 
acids. 
(i) These amino acids can be 
synthesised in the body. 
(ii) They need not be present in the 
diet. 
 
  
  
Page 2


 
 
CBSE XI |  BIOLOGY 
Sample Paper – 2 Solution 
 
     
 
CBSE 
Class XI Biology 
Sample Paper – 2 Solution 
 
SECTION A 
 
1. Cnidaria and Echinodermata 
 
2. Lateral meristem 
OR 
Epidermis – Cortex – Endodermis – Pericycle – Pith  
 
3. It enables glucose transport into cells. 
 
4. Bone marrow 
 
5. It reduces friction between the articulating bones. 
OR 
The neuromuscular junction is the junction between the motor neuron and the 
sarcolemma of the muscle fibre.  
 
SECTION B 
 
6. Phylogenetic classification systems take into account the evolutionary or phylogenetic 
relationships among various organisms. They assume that organisms belonging to the 
same taxa have a common ancestor. 
 
7. Inclusion bodies are non-membrane-bound structures lying in the cytoplasm which 
store reserve materials. 
Examples: Phosphate granules, cyanophycean granules, glycogen granules 
      OR 
Essential amino acids Non-essential amino acids 
(i) These amino acids cannot be 
synthesised in the body. 
(ii) Dietary proteins form the 
source of essential amino 
acids. 
(i) These amino acids can be 
synthesised in the body. 
(ii) They need not be present in the 
diet. 
 
  
  
 
 
CBSE XI |  BIOLOGY 
Sample Paper – 2 Solution 
 
     
 
8.  
i. Oxygen is liberated in the atmosphere during photosynthesis. 
ii. The process of photosynthesis manufactures food for all living organisms. 
 
9. Some carrier proteins allow transport only if two types of molecules move together. 
This is called cotransport. It is of two types: 
i. In the symport method, both molecules cross the membrane in the same direction at 
the same time. 
ii. In the antiport method, both molecules move in the opposite direction. 
 
10. Differences in the growth of plants and animals: 
Growth in plants Growth in animals 
1. Growth occurs in certain regions 
called meristems. 
1. Growth occurs throughout the 
body. 
2. Growth occurs throughout life.  2. Growth occurs only for a limited 
time period after which it stops. 
 
OR 
 
Mitosis occurs in the somatic or body cells of plants and animals where growth is 
involved. 
Significance of mitosis in multicellular organisms: 
? Assists in growth 
? Helps in the repair of injured tissues and replacement of worn-out cells 
  
11. A root cap is the thimble-like structure which covers the root apex or tip in plants.  
Functions of the root cap: To protect the tender apex of the root as it penetrates the soil. 
 
12.  
(a) Metaphase 
(b) Anaphase 
(c) Zygotene of Prophase I (Meiosis) 
(d) Pachytene of Prophase I (Meiosis) 
 
  
Page 3


 
 
CBSE XI |  BIOLOGY 
Sample Paper – 2 Solution 
 
     
 
CBSE 
Class XI Biology 
Sample Paper – 2 Solution 
 
SECTION A 
 
1. Cnidaria and Echinodermata 
 
2. Lateral meristem 
OR 
Epidermis – Cortex – Endodermis – Pericycle – Pith  
 
3. It enables glucose transport into cells. 
 
4. Bone marrow 
 
5. It reduces friction between the articulating bones. 
OR 
The neuromuscular junction is the junction between the motor neuron and the 
sarcolemma of the muscle fibre.  
 
SECTION B 
 
6. Phylogenetic classification systems take into account the evolutionary or phylogenetic 
relationships among various organisms. They assume that organisms belonging to the 
same taxa have a common ancestor. 
 
7. Inclusion bodies are non-membrane-bound structures lying in the cytoplasm which 
store reserve materials. 
Examples: Phosphate granules, cyanophycean granules, glycogen granules 
      OR 
Essential amino acids Non-essential amino acids 
(i) These amino acids cannot be 
synthesised in the body. 
(ii) Dietary proteins form the 
source of essential amino 
acids. 
(i) These amino acids can be 
synthesised in the body. 
(ii) They need not be present in the 
diet. 
 
  
  
 
 
CBSE XI |  BIOLOGY 
Sample Paper – 2 Solution 
 
     
 
8.  
i. Oxygen is liberated in the atmosphere during photosynthesis. 
ii. The process of photosynthesis manufactures food for all living organisms. 
 
9. Some carrier proteins allow transport only if two types of molecules move together. 
This is called cotransport. It is of two types: 
i. In the symport method, both molecules cross the membrane in the same direction at 
the same time. 
ii. In the antiport method, both molecules move in the opposite direction. 
 
10. Differences in the growth of plants and animals: 
Growth in plants Growth in animals 
1. Growth occurs in certain regions 
called meristems. 
1. Growth occurs throughout the 
body. 
2. Growth occurs throughout life.  2. Growth occurs only for a limited 
time period after which it stops. 
 
OR 
 
Mitosis occurs in the somatic or body cells of plants and animals where growth is 
involved. 
Significance of mitosis in multicellular organisms: 
? Assists in growth 
? Helps in the repair of injured tissues and replacement of worn-out cells 
  
11. A root cap is the thimble-like structure which covers the root apex or tip in plants.  
Functions of the root cap: To protect the tender apex of the root as it penetrates the soil. 
 
12.  
(a) Metaphase 
(b) Anaphase 
(c) Zygotene of Prophase I (Meiosis) 
(d) Pachytene of Prophase I (Meiosis) 
 
  
 
 
CBSE XI |  BIOLOGY 
Sample Paper – 2 Solution 
 
     
 
SECTION C 
13.  
  
 
  
14. The following types of cells are present in the epithelium of gastric glands: 
i. Chief cells or peptic cells (zymogen cells) secrete gastric digestive enzymes as 
proenzymes or zymogens, pepsinogen and prorennin, small amount of gastric 
amylase and gastric lipase. 
ii. Oxyntic cells (parietal cells) secrete hydrochloric acid and Castle intrinsic factor 
(factor essential for the absorption of vitamin B12). 
iii. Mucous cells (goblet cells) secrete mucus. 
OR 
Trypsin, lipase and amylase are the enzymes secreted by the pancreas. 
? Trypsin acts in proteins, proteoses and peptones and converts them to shorter 
peptides. 
? Lipase acts on triglycerides and converts them to diglycerides and monoglycerides 
along with the release of fatty acids. 
? Amylase acts on starch and converts it to maltose.  
 
 
15. A mutual exchange of sperm occurs between two worms during mating. During mating, 
the male genital papilla of one earthworm is inserted into the spermathecal pore of the 
other earthworm to transfer the sperms and prostatic fluid. Mature sperm and egg cells 
and nutritive fluid are deposited in cocoons produced by the gland cells of the clitellum. 
Fertilisation and development occur inside the cocoon which slips off the worm and is 
deposited in or on the soil. After about three weeks, each cocoon produces 2–20 baby 
worms; the development is direct and does not involve any larval stage. 
 
  
Page 4


 
 
CBSE XI |  BIOLOGY 
Sample Paper – 2 Solution 
 
     
 
CBSE 
Class XI Biology 
Sample Paper – 2 Solution 
 
SECTION A 
 
1. Cnidaria and Echinodermata 
 
2. Lateral meristem 
OR 
Epidermis – Cortex – Endodermis – Pericycle – Pith  
 
3. It enables glucose transport into cells. 
 
4. Bone marrow 
 
5. It reduces friction between the articulating bones. 
OR 
The neuromuscular junction is the junction between the motor neuron and the 
sarcolemma of the muscle fibre.  
 
SECTION B 
 
6. Phylogenetic classification systems take into account the evolutionary or phylogenetic 
relationships among various organisms. They assume that organisms belonging to the 
same taxa have a common ancestor. 
 
7. Inclusion bodies are non-membrane-bound structures lying in the cytoplasm which 
store reserve materials. 
Examples: Phosphate granules, cyanophycean granules, glycogen granules 
      OR 
Essential amino acids Non-essential amino acids 
(i) These amino acids cannot be 
synthesised in the body. 
(ii) Dietary proteins form the 
source of essential amino 
acids. 
(i) These amino acids can be 
synthesised in the body. 
(ii) They need not be present in the 
diet. 
 
  
  
 
 
CBSE XI |  BIOLOGY 
Sample Paper – 2 Solution 
 
     
 
8.  
i. Oxygen is liberated in the atmosphere during photosynthesis. 
ii. The process of photosynthesis manufactures food for all living organisms. 
 
9. Some carrier proteins allow transport only if two types of molecules move together. 
This is called cotransport. It is of two types: 
i. In the symport method, both molecules cross the membrane in the same direction at 
the same time. 
ii. In the antiport method, both molecules move in the opposite direction. 
 
10. Differences in the growth of plants and animals: 
Growth in plants Growth in animals 
1. Growth occurs in certain regions 
called meristems. 
1. Growth occurs throughout the 
body. 
2. Growth occurs throughout life.  2. Growth occurs only for a limited 
time period after which it stops. 
 
OR 
 
Mitosis occurs in the somatic or body cells of plants and animals where growth is 
involved. 
Significance of mitosis in multicellular organisms: 
? Assists in growth 
? Helps in the repair of injured tissues and replacement of worn-out cells 
  
11. A root cap is the thimble-like structure which covers the root apex or tip in plants.  
Functions of the root cap: To protect the tender apex of the root as it penetrates the soil. 
 
12.  
(a) Metaphase 
(b) Anaphase 
(c) Zygotene of Prophase I (Meiosis) 
(d) Pachytene of Prophase I (Meiosis) 
 
  
 
 
CBSE XI |  BIOLOGY 
Sample Paper – 2 Solution 
 
     
 
SECTION C 
13.  
  
 
  
14. The following types of cells are present in the epithelium of gastric glands: 
i. Chief cells or peptic cells (zymogen cells) secrete gastric digestive enzymes as 
proenzymes or zymogens, pepsinogen and prorennin, small amount of gastric 
amylase and gastric lipase. 
ii. Oxyntic cells (parietal cells) secrete hydrochloric acid and Castle intrinsic factor 
(factor essential for the absorption of vitamin B12). 
iii. Mucous cells (goblet cells) secrete mucus. 
OR 
Trypsin, lipase and amylase are the enzymes secreted by the pancreas. 
? Trypsin acts in proteins, proteoses and peptones and converts them to shorter 
peptides. 
? Lipase acts on triglycerides and converts them to diglycerides and monoglycerides 
along with the release of fatty acids. 
? Amylase acts on starch and converts it to maltose.  
 
 
15. A mutual exchange of sperm occurs between two worms during mating. During mating, 
the male genital papilla of one earthworm is inserted into the spermathecal pore of the 
other earthworm to transfer the sperms and prostatic fluid. Mature sperm and egg cells 
and nutritive fluid are deposited in cocoons produced by the gland cells of the clitellum. 
Fertilisation and development occur inside the cocoon which slips off the worm and is 
deposited in or on the soil. After about three weeks, each cocoon produces 2–20 baby 
worms; the development is direct and does not involve any larval stage. 
 
  
 
 
CBSE XI |  BIOLOGY 
Sample Paper – 2 Solution 
 
     
 
16.  
i. Pseudostratified columnar ciliated epithelium lines the trachea in humans. 
 Advantage: The movements of the cilia propel the mucus and foreign particles 
towards the larynx. 
ii. Mosaic vision is also known as nocturnal vision because it more often occurs at 
night. 
 
17. The cell theory was proposed by Schleiden and Schwann. 
The main postulates of the cell theory are 
i. All living organism are composed of cells and their products.  
ii. New cells arise from pre-existing cells. 
OR 
A mesosome is the extension of the plasma membrane into the cell in the form of 
vesicles, tubules or lamellae in prokaryotic cells. 
Mesosomes help in 
? Increasing the surface area of the plasma membrane and enzymatic content 
? Respiration and secretion 
? Cell wall formation 
? DNA replication and its distribution  
 
18.  
i. Many of the membranous organelles despite being distinct in terms of their 
structure and function are considered together as the endomembrane system 
because their functions are coordinated. 
 It includes 
1. Endoplasmic reticulum 
2. Golgi complex 
3. Vacuoles 
4. Lysosomes 
ii. Because mitochondria possess a single circular DNA molecule, a few RNA molecules, 
70 S ribosomes and other components needed for protein synthesis, they are called 
semiautonomous organelles. 
 
19. Cytokinesis is the process by which the cytoplasm of a cell divides. It corresponds to the 
separation of the two daughter nuclei into two daughter cells. 
In animal cells, a furrow appears in the cell membrane during late anaphase or early 
telophase. The furrow deepens and when they join in the centre, the cytoplasm is 
divided into two compartments. Each compartment with a daughter nucleus is known 
as a daughter cell. 
 
  
Page 5


 
 
CBSE XI |  BIOLOGY 
Sample Paper – 2 Solution 
 
     
 
CBSE 
Class XI Biology 
Sample Paper – 2 Solution 
 
SECTION A 
 
1. Cnidaria and Echinodermata 
 
2. Lateral meristem 
OR 
Epidermis – Cortex – Endodermis – Pericycle – Pith  
 
3. It enables glucose transport into cells. 
 
4. Bone marrow 
 
5. It reduces friction between the articulating bones. 
OR 
The neuromuscular junction is the junction between the motor neuron and the 
sarcolemma of the muscle fibre.  
 
SECTION B 
 
6. Phylogenetic classification systems take into account the evolutionary or phylogenetic 
relationships among various organisms. They assume that organisms belonging to the 
same taxa have a common ancestor. 
 
7. Inclusion bodies are non-membrane-bound structures lying in the cytoplasm which 
store reserve materials. 
Examples: Phosphate granules, cyanophycean granules, glycogen granules 
      OR 
Essential amino acids Non-essential amino acids 
(i) These amino acids cannot be 
synthesised in the body. 
(ii) Dietary proteins form the 
source of essential amino 
acids. 
(i) These amino acids can be 
synthesised in the body. 
(ii) They need not be present in the 
diet. 
 
  
  
 
 
CBSE XI |  BIOLOGY 
Sample Paper – 2 Solution 
 
     
 
8.  
i. Oxygen is liberated in the atmosphere during photosynthesis. 
ii. The process of photosynthesis manufactures food for all living organisms. 
 
9. Some carrier proteins allow transport only if two types of molecules move together. 
This is called cotransport. It is of two types: 
i. In the symport method, both molecules cross the membrane in the same direction at 
the same time. 
ii. In the antiport method, both molecules move in the opposite direction. 
 
10. Differences in the growth of plants and animals: 
Growth in plants Growth in animals 
1. Growth occurs in certain regions 
called meristems. 
1. Growth occurs throughout the 
body. 
2. Growth occurs throughout life.  2. Growth occurs only for a limited 
time period after which it stops. 
 
OR 
 
Mitosis occurs in the somatic or body cells of plants and animals where growth is 
involved. 
Significance of mitosis in multicellular organisms: 
? Assists in growth 
? Helps in the repair of injured tissues and replacement of worn-out cells 
  
11. A root cap is the thimble-like structure which covers the root apex or tip in plants.  
Functions of the root cap: To protect the tender apex of the root as it penetrates the soil. 
 
12.  
(a) Metaphase 
(b) Anaphase 
(c) Zygotene of Prophase I (Meiosis) 
(d) Pachytene of Prophase I (Meiosis) 
 
  
 
 
CBSE XI |  BIOLOGY 
Sample Paper – 2 Solution 
 
     
 
SECTION C 
13.  
  
 
  
14. The following types of cells are present in the epithelium of gastric glands: 
i. Chief cells or peptic cells (zymogen cells) secrete gastric digestive enzymes as 
proenzymes or zymogens, pepsinogen and prorennin, small amount of gastric 
amylase and gastric lipase. 
ii. Oxyntic cells (parietal cells) secrete hydrochloric acid and Castle intrinsic factor 
(factor essential for the absorption of vitamin B12). 
iii. Mucous cells (goblet cells) secrete mucus. 
OR 
Trypsin, lipase and amylase are the enzymes secreted by the pancreas. 
? Trypsin acts in proteins, proteoses and peptones and converts them to shorter 
peptides. 
? Lipase acts on triglycerides and converts them to diglycerides and monoglycerides 
along with the release of fatty acids. 
? Amylase acts on starch and converts it to maltose.  
 
 
15. A mutual exchange of sperm occurs between two worms during mating. During mating, 
the male genital papilla of one earthworm is inserted into the spermathecal pore of the 
other earthworm to transfer the sperms and prostatic fluid. Mature sperm and egg cells 
and nutritive fluid are deposited in cocoons produced by the gland cells of the clitellum. 
Fertilisation and development occur inside the cocoon which slips off the worm and is 
deposited in or on the soil. After about three weeks, each cocoon produces 2–20 baby 
worms; the development is direct and does not involve any larval stage. 
 
  
 
 
CBSE XI |  BIOLOGY 
Sample Paper – 2 Solution 
 
     
 
16.  
i. Pseudostratified columnar ciliated epithelium lines the trachea in humans. 
 Advantage: The movements of the cilia propel the mucus and foreign particles 
towards the larynx. 
ii. Mosaic vision is also known as nocturnal vision because it more often occurs at 
night. 
 
17. The cell theory was proposed by Schleiden and Schwann. 
The main postulates of the cell theory are 
i. All living organism are composed of cells and their products.  
ii. New cells arise from pre-existing cells. 
OR 
A mesosome is the extension of the plasma membrane into the cell in the form of 
vesicles, tubules or lamellae in prokaryotic cells. 
Mesosomes help in 
? Increasing the surface area of the plasma membrane and enzymatic content 
? Respiration and secretion 
? Cell wall formation 
? DNA replication and its distribution  
 
18.  
i. Many of the membranous organelles despite being distinct in terms of their 
structure and function are considered together as the endomembrane system 
because their functions are coordinated. 
 It includes 
1. Endoplasmic reticulum 
2. Golgi complex 
3. Vacuoles 
4. Lysosomes 
ii. Because mitochondria possess a single circular DNA molecule, a few RNA molecules, 
70 S ribosomes and other components needed for protein synthesis, they are called 
semiautonomous organelles. 
 
19. Cytokinesis is the process by which the cytoplasm of a cell divides. It corresponds to the 
separation of the two daughter nuclei into two daughter cells. 
In animal cells, a furrow appears in the cell membrane during late anaphase or early 
telophase. The furrow deepens and when they join in the centre, the cytoplasm is 
divided into two compartments. Each compartment with a daughter nucleus is known 
as a daughter cell. 
 
  
 
 
CBSE XI |  BIOLOGY 
Sample Paper – 2 Solution 
 
     
 
20.  
Oxidative phosphorylation Photophosphorylation 
1. It is the process by which 
synthesis of ATP takes place with 
the help of energy liberated during 
the oxidation of the reduced 
coenzymes NADH and FADH
2
. 
1. It is the process of production of 
ATP by phosphorylation of ADP 
using light energy in 
photosynthesis. 
2. It takes place in the mitochondrial 
electron transport system. 
 
2. It occurs in the thylakoid 
membranes/electron transport in 
chloroplasts. 
 
3. It occurs in all living cells. 
 
3. It occurs in green photosynthetic 
tissues. 
 
4. It takes place continuously in all 
living cells. 
4. It takes place only in the presence 
of light. 
 
OR 
Plant factors which determine the rate of photosynthesis: 
? Internal CO2 concentration 
? Amount of chlorophyll 
? Number, size, age and orientation of leaves 
? Number and size of mesophyll cells 
? Number and size of chloroplasts 
 
21.  
i. Meristematic phase: It corresponds to the cell division phase. 
ii. Elongation phase: It corresponds to the cell enlargement phase. During this phase, 
there is maximum growth of a plant. 
iii. Maturation phase: It corresponds to cell differentiation. During this phase, there is 
not much of an increase in the weight or volume of plants. 
 
22. The most important secretion of the liver is bile. 
Although bile does not contain any enzymes, it has a very significant role in the 
digestion of lipids. Lipase converts emulsified fats to fatty acids, glycerol and 
monoglycerides. 
Thus, the liver acts as a secretory as well as a digestive organ. 
      OR 
Pancreatic juice contains the inactive enzymes trypsinogen, chymotrypsinogen and 
procarboxypeptidases. Trypsinogen is activated into trypsin by the enzyme 
enterokinase, which in turn activates the other enzymes in pancreatic juice. 
Chymotrypsinogen and procarboxypeptidases get converted to chymotrypsin and 
carboxypeptidase. Chymotrypsin converts proteins to peptides, and carboxypeptidase 
further converts peptides to a smaller peptide chain and amino acids.