An enzyme that can stimulate germination of barley seeds is
1. α-amylase
2. lipase
3. protease
4. invertase

Antibodies in our body are complex
1. Steroids
2. prostaglandins
3. Glycoproteins
4. Lipoproteins

Antiparallel strands of a DNA molecule means that

One turn of the helix in a B-form DNA is approximately of the length

The two polynucleotide chains in DNA are
1. parallel
2. discontinuous
3. antiparallel
4. semi - conservative

About 98 percent of the mass of every living organism is composed of just six elements including carbon, hydrogen, nitrogen, oxygen and
1. phosphorus and sulphur
2. sulphur and magnesium
3. magnesium and sodium
4. calcium and phosphorus

Which one of the following is not a constituent of cell membrane
1. Cholesterol
2. Glycolipids
3. Proline
4. Phospholipids

A competitive inhibitor of succinic dehydrogenase is
1. malonate
2. oxaloacetate
3. α-ketoglutarate
4. malate

Three of the following statements about enzymes are correct and one is wrong, which one is wrong
1. Most enzymes are proteins but some are lipids
2. Enzymes require optimum pH for maximal activity
3. Enzymes are denatured at high temperatures but in certain exceptional organisms they are effective even at temperatures 80°- 90°C
4. Enzymes are highly specific

In curve of enzyme catalyzed reaction, the value of velocity of enzyme reaction at point A will be

1. $\frac{1}{2}{V}_{max}$ and velocity may increase by increasing temperature
2.  $\frac{1}{2}{V}_{max}$ and velocity may increase by increasing substrate
3.$\frac{1}{2}{V}_{max}$ and velocity may increase by increasing by catalyst
4. $\frac{1}{2}{V}_{max}$ and velocity remain constant even changing any factor in to the medium.