Sickle cell anemia is an example of_________________?

A. Chromosomal aberration
B. Insertion of gene
C. Deletion of gene
D. Point mutation

The type of plastids which help in pollination is_________?

A. Chromoplasts
B. Leucoplasts
C. Chloroplasts
D. All of these

Purines and pyrimidines are in equal ration in DNA. It was indicated by_______________?

A. F.miescher
B. Chargaff
C. Watson & crick
D. Harshay & chase

Chlorophyll is a/an _____ molecule?

A. Inorganic
B. Cationic
C. Anionic
D. Organic

Ribonucleo-protein particles are the name of__________?

A. Dna
B. Nucleus
C. Eukaryotic ribosomes
D. Rna

Lock and Key model was proposed by______________?

A. Emil fischer
B. Koshland
C. Robin williams
D. Rudolph virchow

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

Amoeboid movements and movement of cyclosis is due to_________?

A. Microfilaments
B. Microtubules
C. Intermediate filaments
D. Cytoskeleton

Enzymes __________________ the activation energy of a chemical reaction?

A. Increases
B. Decreases
C. Does not effect
D. Increases or decreases depending upon individual enzyme

Which one forms the raw material for coenzymes_______________________?

A. Vitamins
B. Carbohydrates
C. Proteins
D. Metals