NEET Test Series-2021 to 2022 MCQ Quiz Hub

1. This statement is true
 microtubules are composed of tubulins
microfilaments are composed of actin
 intermediate filaments are resistant to cytochalasin-B and colchicine
all the above

2.  What are flagella and cilia of eukaryotic cells made of?
tubulin
desmin
lamin
 keratin

3.  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
 flagella
microfilaments
microtubules
intermediate filaments

4. The intermediate filament found in hair and nail is a type I IF protein composed of
 tubulins
keratins
vimentins
lamins

5.  Malformation of these cytoskeleton structures can be linked to an inability to contract muscle
microfilaments
 microtubules
centrioles
intermediate filaments

6.  This is a microfilament inhibitor
cytochalasin-B
 colchicine
cinchonine
aspirin

7.  This is the most heterogenous type of cytoskeleton filament
intermediate filaments
 microfilaments
microtubules
none of the above

8. This cell lacks cytoskeleton
prokaryotic bacterial cells
eukaryotic plant cell
both (a) and (b)
 prokaryotic and eukaryotic animal cells

9. Microfilaments are composed of
mosaic protein
tubulin protein
chitin protein
actin protein

10. Network of microfilaments and microtubules is classified as
cytoskeleton
 active skeleton
vertebral skeleton
endoplasmic skeleton

11. Crossing-over takes place in the
 Diakinesis stage
Anaphase stage
Pachytene stage
 Leptotene stage

12. There are 4 pairs of chromosomes in a Drosophila. The linkage groups present in it are
one more than the pair of chromosomes
one less than the pair of chromosomes
 four
eight

13.  Percentage of crossing over is more when
 genes are located in a different cell
 genes are not linked
linked genes are located close to each other
linked genes are located far apart from each other

14. f the percentage of crossing over between two genes is 10; then the distance between two genes will be
5 morganoid
 10 morgan
20 centimorgans
40 map units

15.  Alleles of different genes that are on the same chromosome can occasionally be separated by a phenomenon called
crossing over
 continuous variation
 epistasis
pleiotropy

16. Repulsion and coupling are two faces of
mutation
chiasmata
 linkage
 crossing over

17. This is the reason why Mendel did not recognize linkage phenomenon in his experiments
he studied only pure plants
he did not have a powerful microscope
characters he studied were situated on different chromosomes
 many chromosomes to handle

18.  Mycoplasma is
eukaryotic and unicellular
 prokaryotic and unicellular
prokaryotic and multicellular
eukaryotic and multicellular

19.  The “witches broom” of legumes is caused by a
 fungus
 bacterium
mycoplasma
virus

20. This species of mycoplasma causes human sterility
T.mycoplasma
M.fermentans
M.hominis
all of the above

21. In mycoplasma; the elementary cell body performs the function of
 respiration
 reproduction
excretion
metabolism

22.  This is called “Jockers of microbiological park”
nostoc
mycoplasma
bacteria
none of these

23.  These are osmotically inactive
 nostoc
 mycoplasma
bacteria
all of these

24.  Vancomycin and Penicillin do not affect the mycoplasma as
there is no Golgi body
 there are no mitochondria
 there is no nucleus
there is no cell wall

25. This is a bacteria without cell wall
cyanobacteria
mycoplasma
viroid
 virus

26. Little leaf of brinjal is caused by
algae
 fungus
mycoplasma
virus

27. This is the smallest organism capable of autonomous growth and reproduction
mycoplasma
 viroid
virus
none of these

28.  Eukaryotic entities
 in the presence of cAMP molecule; it carries out protein synthesis
have only operons assisting in gene expression
transcription takes place in the nucleus and translation in the cytoplasm
transcription occurs in the cytoplasm and translation in nucleus

29. A genomic DNA possesses functioning units; a group of genes under the influence of promoters known as
genes
operons
 anticodon
 codon

30. All regulatory proteins possess a common DNA binding motif that are specific flexess in their protein chains permitting them to interlock with
 the outside groove of DNA helix
the major groove of DNA helix
the minor groove of DNA helix
inner groove of DNA helix

31. 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
regulatory site
operator site
suppressor site
transcriptional control site

32. The transcriptional gene control in eukaryotes is mediated by
metabolites that bind to the cis-acting elements
trans-acting factors failing to bind to cis-acting elements
trans-acting factors binding to cis-acting elements
 repressor proteins that bind to operator sites

33. Basic tools of genetic regulation is the ability of some proteins to bind to specific
 regulatory DNA sequences
regulatory RNA sequences
enzymes of cells
promoter portions of genes

34. In the regulation of gene expression; this is an incorrect statement
 in the bacteria; it permits to replicate with no control
in the bacteria; it permits to adapt to changing environments
permits the maintenance of homeostasis is multicellular entities
permits the functioning of multicellular entities on the whole

35. There are these many histones in the core of a nucleosome
 8
 6
 4
2

36. In eukaryotes and bacteria; most common form of regulation is
 promoter control
translation control
repressor control
transcriptional control

37. ‘Saccus’ term is used for
 exine of pollen grains of Pinus
 intine of pollen grains of Pinus
Wings of pollen grains of Pinus
 Wings of seeds of Pinus

38. Flowers and cones are similar because
 both assist seed dispersal
both are responsible in attracting insects to pollinate
both are shoy and bright
 both are reproductive structures

39. An autotrophic; prokaryotic; nitrogen fixing symbiont is present in
Cicer
 Cycas
Sequoia
Pinus

40. Pick the pair that is incorrectly matched
Cycas – coralloid roots
Abies – wood tar; wood gas
 Pinus – Mycorrhizal roots
 Sequoia – Red wood tree

41. This serves as a connecting link between the angiosperms and gymnosperms
 Gnetales
Coniferales
Ginkgoales
Cycadales