laboursonline – MCQs, Mock Tests | NEET Test Series-2021 to 2022 NEET Biology MCQS Mock Test Paper 19

 ‘Curled toe paralysis’ in chicks is a symptom caused due to the deficiency of

1. Phosphorous
2. Sulphur
3. Niacin
4. Riboflavin

✅ Correct Answer: 4

The fleshy evident mass found between the forelimbs of cows is known as

1. Rump
2. Flank
3. Brisket
4. Dewlap

✅ Correct Answer: 3

Trade name of genetically engineered insulin is

1. Beta insulin
2. Humilin
3. Anulin
4. Gilbert’s insulin

✅ Correct Answer: 2

What is the consequence of a change in the genetic diversity

1. results in loss of biological diversity
2. leads to an increase in the population
3. results in loss of human species only
4. causes pollution

✅ Correct Answer: 1

Increasing genetic diversity interprets daughter chromosome contains genes from

1. None of the parents
2. Single parent
3. Both parents
4. synthesis of own genes

✅ Correct Answer: 3

A phenomenon occurring during prophase I of meiosis is

1. Mutation
2. Synapsis
3. Translation
4. Crossing over

✅ Correct Answer: 2

Crossing over refers to

1. thickening of chromosome
2. change in chromosome
3. Mutation
4. exchange of segments between sections of chromosome

✅ Correct Answer: 4

State the way in which increasing species diversity can affect the ecosystem

1. it does not increase the efficiency and productivity of an ecosystem
2. it increases only the efficiency and not the productivity of an ecosystem
3. it increases the productivity and efficiency of an ecosystem
4. it only increases the productivity of an ecosystem

✅ Correct Answer: 3

Why does genetic diversity have a major role in the adaptability and survival of a species?

1. any population should remain the same regardless of the outer change in the environment
2. Ability of population to adapt to changing environment
3. Environment remains unchanged even if the population changes
4. Population inability to adapt to changing environment

✅ Correct Answer: 2

This biodiversity boosts the oxygen availability

1. Ecosystem diversity
2. Species diversity
3. Genetic diversity
4. Cell diversity

✅ Correct Answer: 1

A country with several different habitat types is said to have a high degree of

1. Genetic diversity
2. Species diversity
3. Biodiversity
4. Habitat diversity

✅ Correct Answer: 4

This is the importance of species diversity

1. species interacts with its environment and hence performs some functions
2. species never interact with the environment
3. species minimize interaction with its environment and hence performs certain functions
4. species does not perform functions though it interacts with the environment

✅ Correct Answer: 1

Name the non-membrane bound organelle exclusively found only in animal cell

1. Sphaerosome
2. Glyoxisome
3. Centriole
4. Peroxisome

✅ Correct Answer: 3

If the centromere is located at the proximity of the end of a chromosome; it is known as

1. Acrocentric
2. Metacentric
3. Telocentric
4. Submetacentric

✅ Correct Answer: 1

Flagella; centrioles; cilia and basal bodies possess evident similar structural elements and arrangements. This can lead to this probable hypothesis

1. Loss of basal bodies should lead to loss of all cilia; flagella; and centrioles
2. Disruption of one of these types of the structure should necessarily disrupt each of the others as well
3. Natural selection for motility must select for microtubular arrays in circular patterns
4. Motor proteins such as dynein must have evolved before any of these four kinds of structure

✅ Correct Answer: 3

In the plasma membrane of a few animals; the presence of cholesterol

1. makes the membrane less flexible permitting it to sustain greater pressure from within the cell
2. enables the membrane to stay fluid more easily when the temperature of the cell drops
3. enables the animal to remove hydrogen atoms from saturated phospholipids
4. enables the animal to add hydrogen atoms to unsaturated phospholipids

✅ Correct Answer: 2

Component of plant cell absent in animal cell is

1. Cytoplasm
2. Cell membrane
3. Cell wall
4. Nucleus

✅ Correct Answer: 3

The association of more than one ribosome with a single molecule of mRNA complex is known as

1. Polysome
2. Polysome
3. Polymer
4. Polysaccharide

✅ Correct Answer: 1

This cell organelle is responsible to extract energy from carbohydrates to form ATP

1. Mitochondrion
2. Lysosome
3. Ribosome
4. Chloroplast

✅ Correct Answer: 1

Balbiani rings are the sites of

1. RNA and protein synthesis
2. Lipid synthesis
3. Nucleotide synthesis
4. Polysaccharide synthesis

✅ Correct Answer: 1

This organism is not an example of eukaryotic cells

1. Euglena viridis
2. Escherichia coli
3. Amoeba proteus
4. Paramoecium caudatum

✅ Correct Answer: 2

The main site of different types of cellular activities is

1. Mitochondrion
2. Nucleus
3. Cytoplasm
4. Plasma membrane

✅ Correct Answer: 3

The protistan genome has

1. Free nucleic acid aggregates
2. Membrane-bound nucleoproteins embedded in the cytoplasm
3. Gene containing nucleoproteins condensed together in a loose mass
4. nucleoprotein in direct contact with cell substance

✅ Correct Answer: 2

The protist that reproduces both by binary fission and conjugation is

1. Amoeba
2. Euglena
3. Paramecium
4. Monocystis

✅ Correct Answer: 3

A few protists possess structures to regulate their water content. They are

1. membranes
2. Chromatophores
3. Nuclei
4. Contractile vacuoles

✅ Correct Answer: 4

Protists include

1. Bacteria; fungi; algae and Bryophyta
2. Protozoa; algae and fungi
3. Vascular plants; slime moulds; and fungi
4. Bacteria; algae; protozoa; and Bryophyta

✅ Correct Answer: 2

Pick the wrong statement

1. Diatoms are primarily produced in the oceans
2. Diatoms are microscopic and float passively in the water
3. Walls of diatoms are destructible easily
4. Diatomaceous earth is formed by the cell walls of diatoms

✅ Correct Answer: 3

Micronucleus and macronucleus are the characteristic features of

1. Balantidium and Hydra
2. Vorticella and Nyctotherus
3. Opalina and Nyctotherus
4. Vorticella and Paramecium

✅ Correct Answer: 4

The cell walls form two thin overlapping shells in which group of organisms such that they fit together

1. Euglenoids
2. Dinoflagellates
3. Slime moulds
4. Chrysophytes

✅ Correct Answer: 4

Whorling whips are named so because of

1. Type of nucleus
2. Mode of movement
3. Mode of reproduction
4. Mode of nutrition

✅ Correct Answer: 2

Red tide is caused by

1. Noctiluca
2. Ceratium
3. Gonyaulax
4. All of the above

✅ Correct Answer: 4

In Dinoflagellates; the reserve food is

1. Fucoxanthin
2. Starch
3. Alginic acid
4. Mannitol

✅ Correct Answer: 2

Find the true statement about benzene

1. it possesses two types of C-C bonds
2. three isomeric forms are possible in a monosubstituted benzene
3. it readily undergoes addition due to unsaturation
4. pi-electrons are delocalised in the ring

✅ Correct Answer: 4

Nitration of benzene is carried out by which of the following reactive species?

1. NO2+
2. NO2–
3. HNO3
4. NO3

✅ Correct Answer: 1

In Chlorination of benzene; which of the following acts as an electrophile?

1. Cl+
2. Cl–
3. Cl
4. FeCl3

✅ Correct Answer: 1

Arenes do not show

1. Delocalisation of pi-electrons
2. Greater stability
3. Resonance
4. Electrophilic additions

✅ Correct Answer: 4

Which of the following groups are most likely to be o; p directing?

1. Deactivating
2. Neutral
3. Activating
4. All of the above

✅ Correct Answer: 3

The product formed predominantly in the reaction of toluene with chlorine in the presence of FeCl3 is

1. m-chlorotoluene
2. o- and p-chlorotoluene
3. Benzoyl chloride
4. Benzyl chloride

✅ Correct Answer: 2

Which of the following will not undergo Friedel-Craft’s reaction readily?

1. Toluene
2. Xylene
3. Cumene
4. Nitrobenzene

✅ Correct Answer: 4

Which of the following is an edible modified root?

1. Potato
2. Sweet potato
3. Groundnut
4. both (a) and (b)

✅ Correct Answer: 2

Clinging roots are found in

1. Podostemon
2. Orchid
3. Trapa
4. Screwpine

✅ Correct Answer: 2

Where do you find velamen?

1. in roots of screwpine
2. in aerial roots of orchids
3. in leaves of Ficus
4. in aerial and terrestrial roots of orchids

✅ Correct Answer: 2

Which of the following has buttress roots?

1. Banyan
2. Sorghum
3. Pandanus
4. Terminalia

✅ Correct Answer: 4

Roots of which of the following plants contains an oxidising agent?

1. Soybean
2. Radish
3. Mustard
4. Carrot

✅ Correct Answer: 1

Roots developing from a part of the plant other than radicle are called

1. Fibrous
2. Adventitious
3. Epicaulous
4. Epiphyllous

✅ Correct Answer: 2

Which of the following plants has stilt roots?

1. Bryophyllum
2. Radish
3. Pandanus
4. Mango

✅ Correct Answer: 3

Assimilatory or photosynthetic roots are present in

1. Tinospora
2. Trapa
3. Taeniophyllum
4. All of the above

✅ Correct Answer: 4

Which of the following is a geocarpic fruit?

1. Garlic
2. Onion
3. Potato
4. Peanut

✅ Correct Answer: 4

Which of the following is homologous with sweet potato?

1. Potato
2. Colocasia
3. Turnip
4. Ginger

✅ Correct Answer: 3

In Angiosperms; the functional megaspore gives rise to

1. ovule
2. embryo
3. embryo sac
4. endosperm

✅ Correct Answer: 3