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Test: Biology Assertion and Reasoning Type Questions (March 28) - NEET MCQ


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30 Questions MCQ Test - Test: Biology Assertion and Reasoning Type Questions (March 28)

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Test: Biology Assertion and Reasoning Type Questions (March 28) - Question 1

Directions: In the following questions, a statement of assertion is followed by a statement of reason. Mark the correct choice as:

Assertion: Bacterial cell wall is characterised by having mucopolysaccharides.

Reason: Acetyl muramic acid is an example of mucopolysaccharide.

Detailed Solution for Test: Biology Assertion and Reasoning Type Questions (March 28) - Question 1

Chemically bacteria consists of acetylglucosamine, acetylmuramic acid and a peptide chain of four or five amino acids. All these chemicals together form a polymer called peptidoglycan (= murein or mucopeptide). Some other chemical substances deposited on the cell wall are - teichoic acid, protein, polysaccharides, lipoproteins and lipopolysaccharides.

Test: Biology Assertion and Reasoning Type Questions (March 28) - Question 2

Directions: In the following questions, a statement of assertion is followed by a statement of reason. Mark the correct choice as: 

Assertion: Spirogyra is slippery to touch.

Reason: Spirogyra consists of a gelatinous sheath.

Detailed Solution for Test: Biology Assertion and Reasoning Type Questions (March 28) - Question 2

The outermost portion of pectose changes into pectin in Spirogyra. The latter dissolves in water to form a gelatinous sheath which is slimy. It envelopes the entire filament. This makes filament slippery to touch

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Test: Biology Assertion and Reasoning Type Questions (March 28) - Question 3

Directions: In the following questions, a statement of assertion is followed by a statement of reason. Mark the correct choice as:

Assertion: Consciousness and response to stimuli can be considered as defining property of living organism.

Reason: The external environmental stimuli can be physical, chemical or biological.

Detailed Solution for Test: Biology Assertion and Reasoning Type Questions (March 28) - Question 3

All organisms, from primitive prokaryotes to most advanced and complex eukaryotes, are able to sense and respond to environmental factors. The stimuli are perceived by sense organs in higher animals through sensory receptors e.g. eyes, ears, nose. Plants do not possess such sense organs. However, they do respond to external factors such as light, water, temperature, pollutants, other organism, etc. Human beings have an additional facility of self consciousness (awareness of self). Consciousness and response to stimuli are said to be the defining properties of living organisms.

Test: Biology Assertion and Reasoning Type Questions (March 28) - Question 4

Directions: In the following questions, a statement of assertion is followed by a statement of reason. Mark the correct choice as:

Assertion: Gram-negative bacteria do not retain the stain when washed with alcohol.

Reason: The outer face of the outer membrane of gram-negative bacteria contains lipopolysaccharides, a part of which is integrated into the membrane lipids.

Detailed Solution for Test: Biology Assertion and Reasoning Type Questions (March 28) - Question 4

Gram negative bacteria contain lipopolysaccharide in its membrane.

Test: Biology Assertion and Reasoning Type Questions (March 28) - Question 5

Directions: In the following questions, a statement of assertion is followed by a statement of reason. Mark the correct choice as:

Assertion: All food chains will come to stand still if bacteria disappear from earth.

Reason: Bacteria are only associated with the soil fertility and hardly any role for food chains.

Detailed Solution for Test: Biology Assertion and Reasoning Type Questions (March 28) - Question 5

Bacteria play an important and dual role by disposing of the dead bodies and wastes of organism and by increasing the fertility of soil.

Test: Biology Assertion and Reasoning Type Questions (March 28) - Question 6

Directions: In the following questions, a statement of assertion is followed by a statement of reason. Mark the correct choice as:

Assertion: Bacteria do not always move with the help of flagella.

Reason: Rotary motion of flagella is employed by flagellated bacteria for movement.

Detailed Solution for Test: Biology Assertion and Reasoning Type Questions (March 28) - Question 6

Myxobacteria do not have flagella and move by gliding movement.

Test: Biology Assertion and Reasoning Type Questions (March 28) - Question 7

Directions: In the following questions, a statement of assertion is followed by a statement of reason. Mark the correct choice as:

Assertion: Plant body is usually grass green in colour in Chlorophyceae.

Reason: Members of Chlorophyceae possess chlorophyll ac, carotenoids and xanthophylls.

Detailed Solution for Test: Biology Assertion and Reasoning Type Questions (March 28) - Question 7

Chlorophyceae are commonly called green algae. The plant body may be unicellular, colonial or filamentous. They are usually grass green in colour due to the dominance of pigments, chlorophyll a and b.

Test: Biology Assertion and Reasoning Type Questions (March 28) - Question 8

Directions: In the following questions, a statement of assertion is followed by a statement of reason. Mark the correct choice as:

Assertion: Animals that have an exoskeleton, lacks an endoskeleton.

Reason: Skeleton cells in the embryonic stage migrate to either stage and produce exoskeleton or endoskeleton but never both.

Detailed Solution for Test: Biology Assertion and Reasoning Type Questions (March 28) - Question 8

Many animals have an endoskeleton and exoskeleton such as Chelon-turtle or Testudo-tortoise. Exoskeleton of other animals include chitinous plate, calcareous shell, horny scales, feathers, hair, claws, nails, hoofs, horns and antlers.

Test: Biology Assertion and Reasoning Type Questions (March 28) - Question 9

Directions: In the following questions, a statement of assertion is followed by a statement of reason. Mark the correct choice as:

Assertion: Algae and fungi are grouped in thallophyta.

Reason: Algae and fungi show no differentiation in thallus.

Detailed Solution for Test: Biology Assertion and Reasoning Type Questions (March 28) - Question 9

On the basis of

  • Thallus like non-vascular plant body.
  • Simple, unicellular non-jacketed sex organs and
  • No embryo development after gametic union, the algae and fungi have long been grouped together in thallophyta. The algae and fungi are the result of parallel development and do not indicate any phylogenetic relationship.
Test: Biology Assertion and Reasoning Type Questions (March 28) - Question 10

Directions: In the following questions, a statement of assertion is followed by a statement of reason. Mark the correct choice as:

Assertion: Deep feeder tap root system is called racemose tap root system.

Reason: It is found in trees.

Detailed Solution for Test: Biology Assertion and Reasoning Type Questions (March 28) - Question 10

Deep feeder tap root system has an elongated tap root which penetrates the deeper layers of the soil. It is mostly found in trees. Deep feeder tap root is also called racemose tap root system. In surface feeders, the tap root does not elongate very much. The secondary roots spread to a greater extent. Such a system is also named as cymose tap root system.

Test: Biology Assertion and Reasoning Type Questions (March 28) - Question 11

Directions: In the following questions, a statement of assertion is followed by a statement of reason. Mark the correct choice as: 

Assertion: Organisms are made up of cells.

Reason: Cells are structural unit of living organisms. A cell keeps its chemical composition steady within its boundary.

Detailed Solution for Test: Biology Assertion and Reasoning Type Questions (March 28) - Question 11

Cells are the basic structural and functional unit of organism.

Test: Biology Assertion and Reasoning Type Questions (March 28) - Question 12

Directions: In the following questions, a statement of assertion is followed by a statement of reason. Mark the correct choice as:

Assertion: Stems of some plants protect them from browsing animals.

Reason: Axillary buds of stems of these plants are modified into thorns

Detailed Solution for Test: Biology Assertion and Reasoning Type Questions (March 28) - Question 12

Stems are modified to perform different functions like storage, protection, mechanical support and photosynthesis etc. Axillary buds of stems may also get modified into woody, straight and pointed thorns.Thorns are found in many plants such as Citrus, Bougainvillea, etc. They protect plants from browsing animals and also reduce transpiration.

Test: Biology Assertion and Reasoning Type Questions (March 28) - Question 13

Directions: In the following questions, a statement of assertion is followed by a statement of reason. Mark the correct choice as:

Assertion: Higher plants have meristematic regions for indefinite growth.

Reason: Higher plants have root and shoot apices.

Detailed Solution for Test: Biology Assertion and Reasoning Type Questions (March 28) - Question 13

Higher plants have root and shoot apices where the cells are in state of continuous division. Here, they can grow indefinitely. Such regions are not found in animals.

Test: Biology Assertion and Reasoning Type Questions (March 28) - Question 14

​​​​​Directions: In the following questions, a statement of assertion is followed by a statement of reason. Mark the correct choice as:

Assertion: The amino acid glycine comes under the category of nonessential amino acids.

Reason: This is due to the fact that it can not be synthesised in the body.

Detailed Solution for Test: Biology Assertion and Reasoning Type Questions (March 28) - Question 14

Non-essential amino acids are those amino acids which need not be supplied in the diet because they can be synthesised by the body, particularly from carbohydrate metabolites. Glycine is one such non essential amino acid. On the contrary, essential amino acids are those amino acids which can not be synthesised in the animal body and must be supplied with food in adequate amounts. Out of twenty amino acids, eight are considered essential in human diet.

Test: Biology Assertion and Reasoning Type Questions (March 28) - Question 15

Directions: In the following questions, a statement of assertion is followed by a statement of reason. Mark the correct choice as:

Assertion: Both internal as well as external growth is show by living organisms.

Reason: Living organisms undergo the process known as accretion.

Detailed Solution for Test: Biology Assertion and Reasoning Type Questions (March 28) - Question 15

Living organisms show internal growth due to addition of materials and formation of cells inside the body. Such a method is called intussusception. While, non-living things grow due to addition of similar materials to their outer surface. The process is called accretion.

Test: Biology Assertion and Reasoning Type Questions (March 28) - Question 16

Directions: In the following questions, a statement of assertion is followed by a statement of reason. Mark the correct choice as:

Assertion: Apical meristem of root is subterminal.

Reason: At the terminal end of root, root cap is present.

Detailed Solution for Test: Biology Assertion and Reasoning Type Questions (March 28) - Question 16

Root cap is the terminal part of root.

Test: Biology Assertion and Reasoning Type Questions (March 28) - Question 17

Directions: In the following questions, a statement of assertion is followed by a statement of reason. Mark the correct choice as: 

Assertion : Columnar epithelium lining the intestinal mucosa appears to have a brush like appearance.

Reason: A Large number of microvilli are present on brush bordered columnar epithelium.

Detailed Solution for Test: Biology Assertion and Reasoning Type Questions (March 28) - Question 17

Columnar epithelium is a type of simple epithelium characterised by the presence of tall column like cells. Its major function is absorption or secretion. It covers the inner surface of the intestine, stomach and gall bladder. In the intestine, it appears to have a brush like appearance on the free surface, which is due to the presence of large number of microvilli. Function of microvilli is to enhance absorption. Due to the presence of microvilli, the epithelium is also called as brush bordered columnar epithelium.

Test: Biology Assertion and Reasoning Type Questions (March 28) - Question 18

Directions: In the following questions, a statement of assertion is followed by a statement of reason. Mark the correct choice as:

Assertion: Apical meristem of root is subterminal.

Reason: At the terminal end of root, root cap is present.

Detailed Solution for Test: Biology Assertion and Reasoning Type Questions (March 28) - Question 18

Root apical meristem is subterminal because of the presence of a protective terminal root cap over it.

Test: Biology Assertion and Reasoning Type Questions (March 28) - Question 19

Directions: In the following questions, a statement of assertion is followed by a statement of reason. Mark the correct choice as:

Assertion: Only anisogamous type of reproduction is seen in algae.

Reason: Gametes can never be non-flagellated in algae.

Detailed Solution for Test: Biology Assertion and Reasoning Type Questions (March 28) - Question 19

In algae, sexual reproduction takes place by fusion of two gametes. These gametes can be flagellated and similar in size (Chlamydomonas) or non-flagellated (non- motile) but similar in size (Spirogyra). Such reproduction is called anisogamous. Fusion of two gametes that are dissimilar in size, as in some species of chlamydomonas is termed as anisogamous. Fusion between one large, non-motile female gamete and a smaller, motile male gamete is termed oogamous.

Test: Biology Assertion and Reasoning Type Questions (March 28) - Question 20

Directions: In the following questions, a statement of assertion is followed by a statement of reason. Mark the correct choice as:

Assertion: Radial symmetry in animal helps in detecting food and danger.

Reason: It enables the animal to respond to stimuli from any direction.

Detailed Solution for Test: Biology Assertion and Reasoning Type Questions (March 28) - Question 20

Radial symmetry is advantageous for an animal in responding to stimuli from any direction thereby allowing it to detect food and danger easily.

Test: Biology Assertion and Reasoning Type Questions (March 28) - Question 21

Directions: In the following questions, a statement of assertion is followed by a statement of reason. Mark the correct choice as:

Assertion: In ctenophores, digestion is chiefly extracellular.

Reason: Digestive tract is incomplete in ctenophores.

Detailed Solution for Test: Biology Assertion and Reasoning Type Questions (March 28) - Question 21

Digestive tract in ctenophores consists of mouth, pharynx or stomodaeum, stomach or infundibulum, anal canals and two anal pores. Since there are mouth and anal pores present, the digestive tract is complete. Thus, digestion is both extracellular and intracellular.

Test: Biology Assertion and Reasoning Type Questions (March 28) - Question 22

Directions: In the following questions, a statement of assertion is followed by a statement of reason. Mark the correct choice as: 

Assertion: The living state is a equilibrium steady state to be able to perform work.

Reason: Living process is a constant effort to prevent falling into non-equilibrium.

Detailed Solution for Test: Biology Assertion and Reasoning Type Questions (March 28) - Question 22

The living systems are in metabolic flux and thus, maintain the concentration of biomolecules, always remaining in non- equilibrium steady state where equilibrium is seldom achieved. No work can be carried out in equilibrium state. Living systems are therefore, regularly receiving an input of energy to prevent reaching an equilibrium and always remain in non-equilibrium steady state. Energy is obtained from metabolism. Metabolism and living state are the, complementary and synonyms.

Test: Biology Assertion and Reasoning Type Questions (March 28) - Question 23

Directions: In the following questions, a statement of assertion is followed by a statement of reason. Mark the correct choice as:

Assertion: The colour of brown algae varies from olive green to brown.

Reason: In brown algae, fucoxanthin is responsible for colour variation.

Detailed Solution for Test: Biology Assertion and Reasoning Type Questions (March 28) - Question 23

Brown algae show a range of colour from olive green to various shades of brown depending upon the amount of fucoxanthin a xanthophyll pigment, present in them.

Test: Biology Assertion and Reasoning Type Questions (March 28) - Question 24

Directions: In the following questions, a statement of assertion is followed by a statement of reason. Mark the correct choice as:

Assertion: Bacteria are prokaryotic.

Reason: Bacteria do not possess true nucleus and membrane bound cell organelles.

Detailed Solution for Test: Biology Assertion and Reasoning Type Questions (March 28) - Question 24

Bacterial cell is prokaryotic. It lacks true nucleus and membrane bound organelles.

Test: Biology Assertion and Reasoning Type Questions (March 28) - Question 25

Directions: In the following questions, a statement of assertion is followed by a statement of reason. Mark the correct choice as:

Assertion: Living organisms possess specific individuality with the definite shape and size.

Reason: Both living and non living entities resemble each other at the lower level of organisation.

Detailed Solution for Test: Biology Assertion and Reasoning Type Questions (March 28) - Question 25

All living organisms have definite shape and size and all show specific individuality with an orderly mannered organisation whereas at the lower level of organisation, both the living and non living are made up of atoms.

Test: Biology Assertion and Reasoning Type Questions (March 28) - Question 26

Directions: In the following questions, a statement of assertion is followed by a statement of reason. Mark the correct choice as:

Assertion: Secondary metabolites are produced in small quantities and their extraction from the plant is difficult and expensive.

Reason: Secondary metabolites can be commercially produced by using tissue culture technique.

Detailed Solution for Test: Biology Assertion and Reasoning Type Questions (March 28) - Question 26

Secondary metabolites are biosynthetically derived from primary metabolites but more limited in distribution in plant kingdom being restricted to a particular taxonomic group. By culture media using tissue culture technique, secondary metabolites can be produced on a large scale.

Test: Biology Assertion and Reasoning Type Questions (March 28) - Question 27

Directions: In the following questions, a statement of assertion is followed by a statement of reason. Mark the correct choice as:

Assertion: In fungi, vegetative reproduction occurs by fragmentation and budding.

Reason: Asexual reproduction in fungi, occurs through formation of asexual spores.

Detailed Solution for Test: Biology Assertion and Reasoning Type Questions (March 28) - Question 27

In fungi, vegetative reproduction occurs by fragmentation, budding (yeast), sclerotia, rhizomorphs, etc. Asexual reproduction occurs through formation of asexual spores such as zoospores, sporangiospores, chlamydospores, oidia, conidia, etc.

Test: Biology Assertion and Reasoning Type Questions (March 28) - Question 28

Directions: In the following questions, a statement of assertion is followed by a statement of reason. Mark the correct choice as:

Assertion: One of the defining property of living organisms is consciousness.

Reason: Human being is the only organism that has self consciousness.

Detailed Solution for Test: Biology Assertion and Reasoning Type Questions (March 28) - Question 28

All living organisms have an inherent ability to sense their surroundings or environment and respond to their environmental stimuli. Plants and animals both respond to the external stimuli. Responses of animals are rapid and can easily be observed because they escape by moving away from the site or environmental stress. The plants, on the other hand, cannot move. They face the stresses and adapt themselves by their slow physiological responses. Human beings are slightly different. They are the only organisms who are aware of themselves, i. e., have self -consciousness.

Test: Biology Assertion and Reasoning Type Questions (March 28) - Question 29

Directions: In the following questions, a statement of assertion is followed by a statement of reason. Mark the correct choice as: 

Assertion: Collenchyma forms the hypodermis of dicotyledon stems.

Reason: This is the reason for flexibility of dicotyledonous stems.

Detailed Solution for Test: Biology Assertion and Reasoning Type Questions (March 28) - Question 29

Collenchyma cells are elongated cells with irregularly thick cell walls that provide support and structure. Their thick cell walls are composed of the compounds cellulose and pectin. These cells are often found under the epidermis, or the outer layer of cells in young stems and in leaf veins.

Test: Biology Assertion and Reasoning Type Questions (March 28) - Question 30

Directions: In the following questions, a statement of assertion is followed by a statement of reason. Mark the correct choice as:

Assertion: Cell secretion does not occur in bacteria.

Reason: Golgi complex is absent in bacteria.

Detailed Solution for Test: Biology Assertion and Reasoning Type Questions (March 28) - Question 30

Cell secretion occurs even in the prokaryotic cells (bacteria) in relation to the production of a variety of enzyme in the medium. While, golgi complex and other membrane bound organelles are absent in prokaryotes.

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