Year-wise Biology practice
NEET 2019 Biology PYQs Check your understanding, bookmark questions and revisit your mistakes.
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90 questions in this collection ยท Page 2 of 9
Cell The Unit Of Life
Which of the following pair of organelles does not
contain DNA:
A Mitochondria and Lysosomes
B Chloroplast and Vacuoles
C Nuclear envelope and Mitochondria
D Lysosomes and Vacuoles
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Cell The Unit Of Life
The shorter and longer arms of a submetacentric
chromosome are referred to as:
A p-arm and q-arm respectively
B s-arm and l-arm respectively
C q-arm and p-arm respectively
D m-arm and n-arm respectively
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Cell The Unit Of Life
Which of the following statements regarding
mitochondria is incorrect?
A Mitochondrial matrix contains single circular
DNA molecule and ribosomes.
B Inner membrane is convoluted with infoldings.
C Enzymes of electron transport are embedded
in outer membrane.
D Outer membrane is permeable to monomers of
carbohydrates fats and proteins.
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Biomolecules
DNA precipitation out of a mixture of biomolecules
can be achieved by treatment with:
A Chilled ethanol
B Isopropanol
C Methanol at room temperature
D Chilled chloroform
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Biomolecules
Which of the following is a commercial blood
cholesterol lowering agent?
A statin
B Lipases
C Streptokinase
D Cyclosporin A
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Biomolecules
Consider the following statements:
(A) Coenzyme or metal ion that is tightly bound to
enzyme protein is called prosthetic group.
(B) A complete catalytic active enzyme with its
bound prosthetic group is called apoenzyme.
Select the correct option.
A Both (A) and (B) are true.
B (A) is true and (B) is false.
C Both (A) and (B) are false.
D (A) is false and (B) is true.
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Cell Cycle And Cell Division
Cells in G0 phase:
A enter the cell cycle
B suspend the cell cycle
C terminate the cell cycle
D exit the cell cycle
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Cell Cycle And Cell Division
The correct sequence of phases of cell cycle is:
A G1 โ Sโ G2
โ M
B Mโ G1 โ G2 โ S
C G1 โ G2 โ Sโ M
D Sโ G1 โ G2 โ M
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Transport In Plants
Xylem translocates:
A Water only
B Water and mineral salts only
C Water, mineral salts and some organic nitrogen
only
D Water, mineral salts, some organic nitrogen and
hormones
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Transport In Plants
Grass leaves curl inwards during very dry weather.
Select the most appropriate reason from the
following:
A Flaccidity of bulliform cells
B Closure of stomata
C Shrinkage of air spaces in spongy mesophyll
D Tyloses in vessels
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