Biology MCQs

1496 MCQs  — Everyday Science MCQs  (Page 26 of 150)

Attempt Biology Quiz
Sickle cell anemia is an example of_________________?
A. Chromosomal aberration
B. Insertion of gene
C. Deletion of gene
D. Point mutation
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The type of plastids which help in pollination is_________?
A. Chromoplasts
B. Leucoplasts
C. Chloroplasts
D. All of these
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Purines and pyrimidines are in equal ration in DNA. It was indicated by_______________?
A. F.miescher
B. Chargaff
C. Watson & crick
D. Harshay & chase
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Chlorophyll is a/an _____ molecule?
A. Inorganic
B. Cationic
C. Anionic
D. Organic
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Ribonucleo-protein particles are the name of__________?
A. Dna
B. Nucleus
C. Eukaryotic ribosomes
D. Rna
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Lock and Key model was proposed by______________?
A. Emil fischer
B. Koshland
C. Robin williams
D. Rudolph virchow
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Which step causes activation of catalytic site of an enzyme__________________?
A. Change in ph of the surroundings.
B. Formation of enzyme susstrate complex.
C. Change in the charge of the active site.
D. Change in temperature
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Amoeboid movements and movement of cyclosis is due to_________?
A. Microfilaments
B. Microtubules
C. Intermediate filaments
D. Cytoskeleton
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Enzymes __________________ the activation energy of a chemical reaction?
A. Increases
B. Decreases
C. Does not effect
D. Increases or decreases depending upon individual enzyme
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Which one forms the raw material for coenzymes_______________________?
A. Vitamins
B. Carbohydrates
C. Proteins
D. Metals
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Word of the Day
12 Jul
Obdurate
stubbornly refusing to change one’s opinion or course of action.
ضدی، بدکار، سنگدلی

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