NEET : Biology (Botany) : 2021- Exam Mode

Biology (Botany) – NEET-2021 – Exam Mode

This quiz is in the format of Exam, has 50 questions ( Attempt 45 – 1to 35, from 36 to 50 any 10) . Results are displayed at end.

Total time duration : 45 Minutes
Points to remember
- Right answer : +4
- Wrong Answer : -1
- Number of attempts : Unlimited

1 / 50

Which of the following plants is monoecious?

Carica papaya

Chara

Marchantia polymorpha

Cycas circinalis

2 / 50

A typical angiosperm embryo sac at maturity is:

8-nucleate and 7-celled

7-nucleate and 8-celled

7-nucleate and 7-celled

8-nucleate and 8-celled

3 / 50

Gemmae are present in

Mosses

Pteridophytes

Some Gymnosperms

Some Liverwort

4 / 50

When the centromere is situated in the middle of two equal arms of chromosomes, the chromosome is referred as :

Metacentric

Telocentric

Sub-metacentric

Acrocentric

5 / 50

Which of the following stages of meiosis involves division of centromere?

Metaphase I

Metaphase II

Anaphase II

Telophase II

6 / 50

The first stable product of CO₂ fixation in Sorghum is

Pyruvic acid

Oxaloacetic acid

Succinic acid

Phosphoglyceric acid

7 / 50

The factor that leads to Founder effect in a population is :

Natural selection

Genetic recombination

Mutation

Genetic drift

8 / 50

Which of the following is an incorrect statement?

Microbodies are present both in plant and animal cells

The perinuclear space forms a barrier between the materials present inside the nucleus and that of the cytoplasm (4) Nuclear pores act as passages for proteins and RNA molecules in both directions between nucleus and cytoplasm

Nuclear pores act as passages for proteins and RNA molecules in both directions between nucleus and cytoplasm

Mature sieve tube elements possess a conspicuous nucleus and usual cytoplasmic organelles

9 / 50

Amensalism can be represented as:

Species A (–); Species B (0)

Species A (+); Species B (+)

Species A (–); Species B (–)

Species A (+); Species B (0)

10 / 50

The amount of nutrients, such as carbon, nitrogen,phosphorus and calcium present in the soil at any given time, is referred as :

Climax

Climax community

Standing state

Standing crop

11 / 50

Which of the following algae contains mannitol as reserve food material?

Ectocarpus

Gracilaria

Volvox

Ulothrix

12 / 50

Inspite of interspecific competition in nature, which mechanism the competing species might have evolved for their survival?

Resource partitioning

Competitive release

Mutualism

Predation

13 / 50

Genera like Selaginella and Salvinia produce two kinds of spores. Such plants are known as:

Homosorus

Heterosorus

Homosporous

Heterosporous

14 / 50

The site of perception of light in plants during photoperiodism is

Shoot apex

Stem

Axillary bud

Leaf

15 / 50

Plants follow different pathways in response to environment or phases of life to form different kinds of structures. This ability is called

Elasticity

Flexibility

Plasticity

Maturity

16 / 50

Match List-I with List-II.

Choose the correct answer from the options given below

(a) (b) (c) (d) -> (iv) (iii) (ii) (i)

(a) (b) (c) (d) -> (i) (iv) (iii) (ii)

(a) (b) (c) (d) -> (iii) (iv) (i) (ii)

(a) (b) (c) (d) -> (ii) (iii) (iv) (i)

17 / 50

Match List-I with List-II

Choose the correct answer from the options given below.

(a) (b) (c) (d) -> (ii) (iv) (i) (iii)

(a) (b) (c) (d) -> (iv) (iii) (ii) (i)

(a) (b) (c) (d) ->(iii) (i) (iv) (ii)

(a) (b) (c) (d) -> (ii) (i) (iv) (iii)

18 / 50

DNA strands on a gel stained with ethidium bromide when viewed under UV radiation, appear as

Yellow bands

Bright orange bands

Dark red bands

Bright blue bands

19 / 50

The term used for transfer of pollen grains from anthers of one plant to stigma of a different plant which, during pollination, brings genetically different types of pollen grains to stigma, is :

Xenogamy

Geitonogamy

Chasmogamy

Cleistogamy

20 / 50

Which of the following algae produce Carrageen?

Green algae

Brown algae

Red algae

White algae

21 / 50

Which of the following statements is not correct?

Pyramid of biomass in sea is generally inverted.

Pyramid of biomass in sea is generally upright.

Pyramid of energy is always upright.

Pyramid of numbers in a grassland ecosystem is upright.

22 / 50

In the equation GPP – R = NPP R represents :

Radiant energy

Retardation factor

Environmental factor

Respiration losses

23 / 50

Diadelphous stamens are found in

China rose

Citrus

Pea

China rose and citrus

24 / 50

When gene targetting involving gene amplification isattempted in an individual’s tissue to treat disease,it is known as :

Biopiracy

Gene therapy

Molecular diagnosis

Safety testing

25 / 50

Match List-I with List-II.

	Column – I		Column – II
a	Lenticels	i	Phellogen
b	Cork cambium	ii	Suberin deposition
c	Secondary cortex	iii	Exchange of gases
d	Cork	iv	Phelloderm

Choose the correct answer from the options given below.

(a) (b) (c) (d) -> (iv) (i) (iii) (ii)

(a) (b) (c) (d) ->(iii) (i) (iv) (ii)

(a) (b) (c) (d) ->(ii) (iii) (iv) (i)

(a) (b) (c) (d) ->(iv) (ii) (i) (iii)

26 / 50

The production of gametes by the parents, formation of zygotes, the F1 and F2 plants, can be understood from a diagram called :

Bullet square

Punch square

Punnett square

Net square

27 / 50

Which of the following is a correct sequence ofsteps in a PCR (Polymerase Chain Reaction)?

Denaturation, Annealing, Extension

Denaturation, Extension, Annealing

Extension, Denaturation, Annealing

Annealing, Denaturation, Extension

28 / 50

Mutations in plant cells can be induced by:

Kinetin

Infrared rays

Gamma rays

Zeatin

29 / 50

Match List-I with List-I

	Column – I		Column – II
a	Protoplast fusion	i	Totipotency
b	Plant tissue culture	ii	Pomato
c	Meristem culture	iii	Somaclones
d	Micropropagation	iv	Virus free plants

Choose the correct answer from the options given below.

(a) (b) (c) (d) -> (iii) (iv) (ii) (i)

(a) (b) (c) (d) -> (ii) (i) (iv) (iii)

(a) (b) (c) (d) -> (iii) (iv) (i) (ii)

(a) (b) (c) (d) -> (iv) (iii) (ii) (i)

30 / 50

During the purification process for recombinant DNA technology, addition of chilled ethanol precipitates out :

RNA

DNA

Histones

Polysaccharides

31 / 50

Complete the flow chart on central dogma

(a)-Replication; (b)-Transcription; (c)-Transduction; (d)-Protein

(a)-Translation; (b)-Replication; (c)-Transcription;(d)-Transduction

(a)-Replication; (b)-Transcription; (c)-Translation; (d)Protein

(a)-Transduction; (b)-Translation; (c)-Replication; (d)-Protein

32 / 50

Which of the following is not an application of PCR(Polymerase Chain Reaction)?

Molecular diagnosis

Gene amplification

Purification of isolated protein

Detection of gene mutation

33 / 50

The plant hormone used to destroy weeds in a field

IAA

NAA

2, 4-D

IBA

34 / 50

Match List-I with List-II

Select the correct answer from the options given below.

(a) (b) (c) (d) -> (ii) (iv) (i) (iii)

(a) (b) (c) (d) -> (iv) (iii) (ii) (i)

(a) (b) (c) (d) -> (i) (ii) (iii) (iv)

(a) (b) (c) (d) -> (iii) (ii) (iv) (i)

35 / 50

Which of the following are not secondary metabolites in plants?

Morphine, codeine

Amino acids, glucose

Vinblastin, curcumin

Rubber, gums

36 / 50

Which of the following statements is incorrect?

During aerobic respiration, role of oxygen is limited to the terminal stage

In ETC (Electron Transport Chain), one molecule of NADH + H⁺ gives rise to 2 ATP molecules, and one FADH₂ gives rise to 3 ATP molecules

ATP is synthesized through complex V

Oxidation-reducation reactions produce proton gradient in respiration

37 / 50

Match Column-I with Column-II

Choose the correct answer from options given below.

(a) (b) (c) (d) : (ii) (iv) (i) (iii)

(a) (b) (c) (d) : (i) (ii) (iii) (iv)

(a) (b) (c) (d) : (iii) (i) (iv) (ii)

(a) (b) (c) (d) : (iv) (iii) (ii) (i)

38 / 50

Match Column-I with Column-II

Select the correct answer from the options given below.

(a) (b) (c) (d) :(iii) (iv) (ii) (i)

(a) (b) (c) (d) :(i) (ii) (iii) (iv)

(a) (b) (c) (d) : (ii) (iii) (iv) (i)

(a) (b) (c) (d) :(iv) (ii) (i) (iii)

39 / 50

Identify the correct statement.

In capping, methyl guanosine triphosphate is added to the 3′ end of hna

RNA polymerase binds with Rho factor to terminate the process of transcription in bacteria

The coding strand in a transcription unit is copied to an mRNA

Split gene arrangement is characteristic of prokaryotes

40 / 50

Which of the following statements is correct ?

Fusion of two cells is called Karyogamy

Fusion of protoplasms between two motile on non-motile gametes is called plasmogamy

Organisms that depend on living plants are called saprophytes

Some of the organisms can fix atmospheric nitrogen in specialized cells called sheath cells

41 / 50

Select the correct pair.

Large colorless empty – Subsidiary cells cells in the epidermis of grass leaves

In dicot leaves, vascular – Conjunctive bundles are surrounded tissue by large thick-walled cells

Cells of medullary rays – Interfascicular that form part of cambium cambial ring

Loose parenchyma cells – Spongy rupturing the epidermis parenchyma and forming a lens shaped opening in bark

42 / 50

DNA fingerprinting involves identifying differences in some specific regions in DNA sequence, called as

Satellite DNA

Repetitive DNA

Single nucleotides

Polymorphic DNA

43 / 50

In some members of which of the following pairs of families, pollen grains retain their viability for months after release?

Poaceae ; Rosaceae

Poaceae ; Leguminosae

Poaceae ; Solanaceae

Rosaceae ; Leguminosae

44 / 50

Which of the following statements is incorrect?

Both ATP and NADPH + H+ are synthesized during non-cyclic photophosphorylation (2)

Stroma lamellae have PS I only and lack NADP reductase

Grana lamellae have both PS I and PS II

Cyclic photophosphorylation involves both PS I and PS II

45 / 50

What is the role of RNA polymerase III in the process of transcription in eukaryotes?

Transcribes rRNAs (28S, 18S and 5.8S)

Transcribes tRNA, 5s rRNA and snRNA

Transcribes precursor of mRNA

Transcribes only snRNAs

46 / 50

In the exponential growth equation N_t= N₀e ^rt, e represents

The base of number logarithms

The base of exponential logarithms

The base of natural logarithms

The base of geometric logarithms

47 / 50

Now a days it is possible to detect the mutated gene causing cancer by allowing radioactive probe to hybridise its complimentary DNA in a clone of cells,
followed by its detection using autoradiography because :

mutated gene partially appears on a photographic film

mutated gene completely and clearly appears on a photographic film

mutated gene does not appear on a photographic film as the probe has no complementarity with it

mutated gene does not appear on photographic film as the probe has complementarity with

48 / 50

Match List-I with List-II.

	List- I		List – II
a	Protein	i	C = C double bonds
b	Unsaturated fatty acid	ii	Phosphodiester bonds
c	Nucleic acid	iii	Glycosidic bonds
d	Polysaccharide	iv	Peptide bonds

Choose the correct answer from the options given below.

(a) (b) (c) (d) : (iv) (i) (ii) (iii)

(a) (b) (c) (d) : (i) (iv) (iii) (ii)

(a) (b) (c) (d) : (ii) (i) (iv) (iii)

(a) (b) (c) (d) : (iv) (iii) (i) (ii)

49 / 50

Match List-I with List-II

Choose the correct answer from the options given below.

(a) (b) (c) (d): (iii) (ii) (i) (iv)

(a) (b) (c) (d):(iv) (ii) (iii) (i)

(a) (b) (c) (d):(iv) (i) (ii) (iii)

(a) (b) (c) (d): (ii) (iv) (iii) (i)

50 / 50

Plasmid pBR322 has Pstl restriction enzyme site within gene^R that confers ampicillin resistance.If this enzyme is used for inserting a gene for β-galactoside production and the recombinant plasmid is inserted in an E.coli strain

It will not be able to confer ampicillin resistance to the host cell

The transformed cells will have the ability to resist ampicillin as well as produce β-galactoside

It will lead to lysis of host cell

It will be able to produce a novel protein with dual ability

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