R4RIN – MCQs, Mock Tests | NEET Test Series-2021 to 2022 NEET Biology MCQS Mock Test Paper 2

This statement is true

1. microtubules are composed of tubulins
2. microfilaments are composed of actin
3. intermediate filaments are resistant to cytochalasin-B and colchicine
4. all the above

✅ Correct Answer: 4

What are flagella and cilia of eukaryotic cells made of?

1. tubulin
2. desmin
3. lamin
4. keratin

✅ Correct Answer: 1

Cell lining of the lumen of the fallopian tube is involved in ciliary action to transport the egg from the ovary to the uterus. The cytoskeleton structure responsible for this movement is

1. flagella
2. microfilaments
3. microtubules
4. intermediate filaments

✅ Correct Answer: 3

The intermediate filament found in hair and nail is a type I IF protein composed of

1. tubulins
2. keratins
3. vimentins
4. lamins

✅ Correct Answer: 2

Malformation of these cytoskeleton structures can be linked to an inability to contract muscle

1. microfilaments
2. microtubules
3. centrioles
4. intermediate filaments

✅ Correct Answer: 1

This is a microfilament inhibitor

1. cytochalasin-B
2. colchicine
3. cinchonine
4. aspirin

✅ Correct Answer: 1

This is the most heterogenous type of cytoskeleton filament

1. intermediate filaments
2. microfilaments
3. microtubules
4. none of the above

✅ Correct Answer: 1

This cell lacks cytoskeleton

1. prokaryotic bacterial cells
2. eukaryotic plant cell
3. both (a) and (b)
4. prokaryotic and eukaryotic animal cells

✅ Correct Answer: 1

Microfilaments are composed of

1. mosaic protein
2. tubulin protein
3. chitin protein
4. actin protein

✅ Correct Answer: 4

Network of microfilaments and microtubules is classified as

1. cytoskeleton
2. active skeleton
3. vertebral skeleton
4. endoplasmic skeleton

✅ Correct Answer: 2

Crossing-over takes place in the

1. Diakinesis stage
2. Anaphase stage
3. Pachytene stage
4. Leptotene stage

✅ Correct Answer: 3

There are 4 pairs of chromosomes in a Drosophila. The linkage groups present in it are

1. one more than the pair of chromosomes
2. one less than the pair of chromosomes
3. four
4. eight

✅ Correct Answer: 3

Percentage of crossing over is more when

1. genes are located in a different cell
2. genes are not linked
3. linked genes are located close to each other
4. linked genes are located far apart from each other

✅ Correct Answer: 4

f the percentage of crossing over between two genes is 10; then the distance between two genes will be

1. 5 morganoid
2. 10 morgan
3. 20 centimorgans
4. 40 map units

✅ Correct Answer: 2

Alleles of different genes that are on the same chromosome can occasionally be separated by a phenomenon called

1. crossing over
2. continuous variation
3. epistasis
4. pleiotropy

✅ Correct Answer: 1

Repulsion and coupling are two faces of

1. mutation
2. chiasmata
3. linkage
4. crossing over

✅ Correct Answer: 3

This is the reason why Mendel did not recognize linkage phenomenon in his experiments

1. he studied only pure plants
2. he did not have a powerful microscope
3. characters he studied were situated on different chromosomes
4. many chromosomes to handle

✅ Correct Answer: 3

Mycoplasma is

1. eukaryotic and unicellular
2. prokaryotic and unicellular
3. prokaryotic and multicellular
4. eukaryotic and multicellular

✅ Correct Answer: 2

The “witches broom” of legumes is caused by a

1. fungus
2. bacterium
3. mycoplasma
4. virus

✅ Correct Answer: 3

This species of mycoplasma causes human sterility

1. T.mycoplasma
2. M.fermentans
3. M.hominis
4. all of the above

✅ Correct Answer: 4

In mycoplasma; the elementary cell body performs the function of

1. respiration
2. reproduction
3. excretion
4. metabolism

✅ Correct Answer: 2

This is called “Jockers of microbiological park”

1. nostoc
2. mycoplasma
3. bacteria
4. none of these

✅ Correct Answer: 2

These are osmotically inactive

1. nostoc
2. mycoplasma
3. bacteria
4. all of these

✅ Correct Answer: 2

Vancomycin and Penicillin do not affect the mycoplasma as

1. there is no Golgi body
2. there are no mitochondria
3. there is no nucleus
4. there is no cell wall

✅ Correct Answer: 4

This is a bacteria without cell wall

1. cyanobacteria
2. mycoplasma
3. viroid
4. virus

✅ Correct Answer: 2

Little leaf of brinjal is caused by

1. algae
2. fungus
3. mycoplasma
4. virus

✅ Correct Answer: 3

This is the smallest organism capable of autonomous growth and reproduction

1. mycoplasma
2. viroid
3. virus
4. none of these

✅ Correct Answer: 1

Eukaryotic entities

1. in the presence of cAMP molecule; it carries out protein synthesis
2. have only operons assisting in gene expression
3. transcription takes place in the nucleus and translation in the cytoplasm
4. transcription occurs in the cytoplasm and translation in nucleus

✅ Correct Answer: 3

A genomic DNA possesses functioning units; a group of genes under the influence of promoters known as

1. genes
2. operons
3. anticodon
4. codon

✅ Correct Answer: 2

All regulatory proteins possess a common DNA binding motif that are specific flexess in their protein chains permitting them to interlock with

1. the outside groove of DNA helix
2. the major groove of DNA helix
3. the minor groove of DNA helix
4. inner groove of DNA helix

✅ Correct Answer: 2

Regulatory proteins turn transcription off through binding to a site rapidly at the front of the promoter and many times even overlaps the promoter; this site is the

1. regulatory site
2. operator site
3. suppressor site
4. transcriptional control site

✅ Correct Answer: 2

The transcriptional gene control in eukaryotes is mediated by

1. metabolites that bind to the cis-acting elements
2. trans-acting factors failing to bind to cis-acting elements
3. trans-acting factors binding to cis-acting elements
4. repressor proteins that bind to operator sites

✅ Correct Answer: 3

Basic tools of genetic regulation is the ability of some proteins to bind to specific

1. regulatory DNA sequences
2. regulatory RNA sequences
3. enzymes of cells
4. promoter portions of genes

✅ Correct Answer: 1

In the regulation of gene expression; this is an incorrect statement

1. in the bacteria; it permits to replicate with no control
2. in the bacteria; it permits to adapt to changing environments
3. permits the maintenance of homeostasis is multicellular entities
4. permits the functioning of multicellular entities on the whole

✅ Correct Answer: 1

There are these many histones in the core of a nucleosome

1. 8
2. 6
3. 4
4. 2

✅ Correct Answer: 1

In eukaryotes and bacteria; most common form of regulation is

1. promoter control
2. translation control
3. repressor control
4. transcriptional control

✅ Correct Answer: 4

‘Saccus’ term is used for

1. exine of pollen grains of Pinus
2. intine of pollen grains of Pinus
3. Wings of pollen grains of Pinus
4. Wings of seeds of Pinus

✅ Correct Answer: 3

Flowers and cones are similar because

1. both assist seed dispersal
2. both are responsible in attracting insects to pollinate
3. both are shoy and bright
4. both are reproductive structures

✅ Correct Answer: 4

An autotrophic; prokaryotic; nitrogen fixing symbiont is present in

1. Cicer
2. Cycas
3. Sequoia
4. Pinus

✅ Correct Answer: 2

Pick the pair that is incorrectly matched

1. Cycas – coralloid roots
2. Abies – wood tar; wood gas
3. Pinus – Mycorrhizal roots
4. Sequoia – Red wood tree

✅ Correct Answer: 2

This serves as a connecting link between the angiosperms and gymnosperms

1. Gnetales
2. Coniferales
3. Ginkgoales
4. Cycadales

✅ Correct Answer: 1