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NEET Biology MCQ
Neet Biology Cell Structure And Organelle Mcq
Quiz 21
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Q.1
on Q444) How many of the following are not the part of endomembrane system? Endoplasmic reticulum, Golgi complex, Lysosome, Chloroplast, Mitochondria, Peroxisomes.
0%
a) 4
0%
b) 3
0%
c) 5
0%
d) 2
Explanation
Answer:(b)
Q.2
on Q445) Ribosome factories are: (i) Non membrane bound structures. (ii) Seen in both cytoplasm and nucleus. (iii) Site for r-RNA synthesis. (iv) Spherical in shape.
0%
a) (i), (ii) and (iv).
0%
b) (i) and (iii).
0%
c) All except (iv).
0%
d) All except (ii).
Explanation
Answer:(d)
Q.3
on Q446) Ergastoplasm is a modification of:
0%
a) RER.
0%
b) SER.
0%
c) GB.
0%
d) None of these.
Explanation
Answer:(a)
Q.4
on Q447) Which structure serves as a protective layer against attack by phagocytes and by viruses?
0%
a) Capsule
0%
b) Appendages
0%
c) Mesosome
0%
d) Mitochondria
Explanation
Answer:(a)
Q.5
on Q448) Robert Brown discovered nucleus first in:
0%
a) Orchid roots.
0%
b) Orchid flowers.
0%
c) Orchid leaves.
0%
d) Orchid pollen grains.
Explanation
Robert Brown while studying the orchid roots in 1831, found a prominent round structure in it and named it nucleus. Answer:(a)
Q.6
on Q449) Bright colours of ripe fruits are due to:
0%
a) Amyloplasts.
0%
b) Leucoplasts.
0%
c) Chromoplasts.
0%
d) Chloroplasts.
Explanation
Answer:(c)
Q.7
on Q450) A student placed two cells in the same solution in two different containers. The observation was given in the table. Which structure maintains the shape of the cell present in container 2 and provides the most significant difference between the two cells?
Container
Observation
1
Cell burst
2
Cell does not change its shape
0%
a) Nucleus.
0%
b) Cell wall.
0%
c) Chloroplast.
0%
d) Cell membrane.
Explanation
Answer:(b)
Q.8
on Q451) Lysosomes were discovered by:
0%
a) Christian de duve.
0%
b) Spallanzani.
0%
c) Dujardine
0%
d) J. Q Plower.
Explanation
Answer:(a)
Q.9
on Q452) Hammerling's experiments on Acetabularia proved genetic information is in....
0%
a) Cytoplasm.
0%
b) Nucleus.
0%
c) Rhizoid and stalk.
0%
d) Gametes.
Explanation
Hammerling's experiment with the single celled green algae, Acetabularia, showed that the nucleus of a cell contains the genetic information that directs cellular development. Hammerling’s experiments with the single celled green algae, Acetabularia,showed that the nucleus of a cell contains the genetic information that directs cellular development. Each Acetabularia cell is composed of 3 segments, the foot or base which contains the nucleus, stalk and the cap. In his experiments, he grafted the stalk of one species of Acetabularia onto the foot of another species. In all cases, the cap that eventually developed on the grafted cell matched the species of the foot rather than that of stalk. This experiment shows that the base is responsible for the type of cap that grows and nucleus directs cellular development. Answer:(b)
Q.10
on Q453) Unstained living tissues of a cell can be examined by:
0%
a) Phase contrast microscope.
0%
b) Electron microscope.
0%
c) Light microscope.
0%
d) Autoradiography.
Explanation
Answer:(a)
Q.11
on Q454) Who invented electron microscope?
0%
a) Jansen.
0%
b) Edison.
0%
c) Knoll and Ruska.
0%
d) Landsteiner.
Explanation
Answer:(c)
Q.12
on Q455) The leucoplast which stores protein is known as...
0%
a) Aleuroplasts
0%
b) Chloroplasts
0%
c) Amyloplasts
0%
d) Elaioplasts
Explanation
Answer:(a)
Q.13
on Q456) Match the following organisms with their approximate sizes:
a. Bacteria
10 - 20 µm
b. Eukaryotic cell
0.1 µm
c. PPLO
0.02 - 0.2 µm
d. Viruses
1 - 2 µm
0%
a) a = 1 ; b = 2 ; c = 3 ; d = 4
0%
b) a = 4 ; b = 1 ; c = 2 ; d = 3
0%
c) a = 4 ; b = 1 ; c = 3 ; d = 2
0%
d) a = 1 ; b = 4 ; c = 2 ; d = 3
Explanation
Answer:(b)
Q.14
on Q457) Which one is not true for mitochondria?
0%
a) Unless specifically stained, are not easily visible under microscope.
0%
b) The number of mitochondria is constant irrespective of the physiological activity of the cells.
0%
c) These are sausage shaped or cylindrical having a diameter of 0.2 - 1.0µm and length 1.0 - 4.1µm.
0%
d) All of the above.
Explanation
Answer:(b)
Q.15
on Q458) r-RNA composition of larger subunit of ribosomes are:
0%
a) 18S + 33S.
0%
b) 28S + 5.8S + 5S.
0%
c) 23S + 40S.
0%
d) 16S + 8S + 5S.
Explanation
Answer:(c)
Q.16
on Q459) largest organelle in a plant cell is:
0%
a) mitochondrion
0%
b) chloroplast
0%
c) ribosome.
0%
d) golgi apparatus
Explanation
The largest organelle in a cell is the nucleus; the next largest would be the chloroplast— only found in plant cells—which is substantially larger than a mitochondrion. The smallest organelle in a cell is the ribosome. Answer:(b)
Q.17
on Q460) The size of prokaryotic ribosome is:
0%
a) 10nm by 20nm.
0%
b) 10nm by 15nm.
0%
c) 15nm by 20nm.
0%
d) 15nm by 25nm.
Explanation
Answer:(c)
Q.18
on Q461) Which organelle possesses circular DNA?
0%
a) Chloroplast
0%
b) Lysosome
0%
c) Ribosome
0%
d) Golgi apparatus
Explanation
Answer:(a)
Q.19
on Q462) Match the following:
a. Steward
Ribophorin I
b. Plasmid
Hypnotoxin of nematoblasts
c. RER
Cellular totipotency
d. Golgi apparatus
Aerobic respiration
e. Mitochondria
Fertility factor
0%
a) a - 3 ; b - 2 ; c-2 ; d -5 ; e -4
0%
b) a - 5 ; b - 1 ; c-3 ; d -4 ; e -2
0%
c) a - 5 ; b - 2 ; c-3 ; d -4 ; e -1
0%
d) a - 3 ; b - 5 ; c-1 ; d -2 ; e -4
Explanation
Answer:(d)
0 h : 0 m : 1 s
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