NEET Test Series-2021/NEET Biology MCQS Mock Test Paper 2 Sample Test,Sample questions

Question:
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


Question:
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


Question:
An autotrophic; prokaryotic; nitrogen fixing symbiont is present in

1.Cicer

2. Cycas

3.Sequoia

4.Pinus


Question:
‘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


Question:
 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


Question:
 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


Question:
 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


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

1.microfilaments

2. microtubules

3.centrioles

4.intermediate filaments


Question:
 Mycoplasma is

1.eukaryotic and unicellular

2. prokaryotic and unicellular

3.prokaryotic and multicellular

4.eukaryotic and multicellular


Question:
 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


Question:
 The “witches broom” of legumes is caused by a

1. fungus

2. bacterium

3.mycoplasma

4.virus


Question:
 These are osmotically inactive

1. nostoc

2. mycoplasma

3.bacteria

4.all of these


Question:
 This is a microfilament inhibitor

1.cytochalasin-B

2. colchicine

3.cinchonine

4.aspirin


Question:
 This is called “Jockers of microbiological park”

1.nostoc

2.mycoplasma

3.bacteria

4.none of these


Question:
 This is the most heterogenous type of cytoskeleton filament

1.intermediate filaments

2. microfilaments

3.microtubules

4.none of the above


Question:
 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


Question:
 What are flagella and cilia of eukaryotic cells made of?

1.tubulin

2.desmin

3.lamin

4. keratin


Question:
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


Question:
Crossing-over takes place in the

1. Diakinesis stage

2.Anaphase stage

3.Pachytene stage

4. Leptotene stage


Question:
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


Question:
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


Question:
In eukaryotes and bacteria; most common form of regulation is

1. promoter control

2.translation control

3.repressor control

4.transcriptional control


Question:
In mycoplasma; the elementary cell body performs the function of

1. respiration

2. reproduction

3.excretion

4.metabolism


Question:
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


Question:
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


Question:
Little leaf of brinjal is caused by

1.algae

2. fungus

3.mycoplasma

4.virus


Question:
Microfilaments are composed of

1.mosaic protein

2.tubulin protein

3.chitin protein

4.actin protein


Question:
Network of microfilaments and microtubules is classified as

1.cytoskeleton

2. active skeleton

3.vertebral skeleton

4.endoplasmic skeleton


Question:
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


Question:
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


Question:
Repulsion and coupling are two faces of

1.mutation

2.chiasmata

3. linkage

4. crossing over


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

1. tubulins

2.keratins

3.vimentins

4.lamins


Question:
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


Question:
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


Question:
There are these many histones in the core of a nucleosome

1. 8

2. 6

3. 4

4.2


Question:
This cell lacks cytoskeleton

1.prokaryotic bacterial cells

2.eukaryotic plant cell

3.both (a) and (b)

4. prokaryotic and eukaryotic animal cells


Question:
This is a bacteria without cell wall

1.cyanobacteria

2.mycoplasma

3.viroid

4. virus


Question:
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


Question:
This is the smallest organism capable of autonomous growth and reproduction

1.mycoplasma

2. viroid

3.virus

4.none of these


Question:
This serves as a connecting link between the angiosperms and gymnosperms

1. Gnetales

2.Coniferales

3.Ginkgoales

4.Cycadales


Question:
This species of mycoplasma causes human sterility

1.T.mycoplasma

2.M.fermentans

3.M.hominis

4.all of the above


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