All enzymes are proteins except
1. Trypsin
2. Pepsin
3. Steapsin
4. Ribozyme and Ribonuclease-P
Study the reaction given below
In absence of any enzyme this reaction is very slow, with 200 molecules of H2CO3 formed in one hour. In presence of an enzyme the reaction speeds up dramatically with about 600,000 molecules formed every second. Name the enzyme which has accelerated up the reaction by 10 million times.
1. Ribozyme
2. Carbonic anhydrase
3. Catalase
4. Peroxidase
Which of the following set of coenzymes are nucleotides of vitamin niacin ?
1. NAD, NADP
2. FMN, FAD
3. ATP, ADP
4. ATP, FAD
Which of the following factor(s) do(es) not affect enzyme activity?
A. Temperature
B. pH
C. Enzyme concentration
D.Product concentration
E. Substrate concentration
F. Activation energy
1. C only
2. C & D
3. D only
4. F only
The 3' - 5' phosphodiester linkages inside polynudeotide chain serve to join
1. One DNA strand with the other DNA strand
2. One nucleoside with another nucleoside.
3. One nucleotide with another nucleotide
4. One nitrogenous base with pentose sugar
Chitin present in the exoskeletons of arthropods is
1. Protein
2. Polysaccharide
3. Lipid
4. Derived monosaccharide
Which of following is a secondary metabolits as well as a drug?
1. Concanavalin A
2. Vinblastine
3. Diterpenes
4. Ricin
Which of the following is the most abundant element present in human body?
1. Carbon
2. Hydrogen
3. Oxygen
4. Nitrogen
Which of the following secondary metabolites is a polymeric substance?
1. Ricin
2. Monoterpenes
3. Curcumin
4. Rubber
Which of the following is present in acid insoluble fraction?
1. Glucose
2. Fructose
3. Alanine
4. Lipid