BIOLOGY 1 Marks Question

Starch consists of two components, i.e., unbranched spirally coiled amylose molecules and branched amylopectin molecules. Both are glucose polymers,hence it is called as homopolysaccharide.

Enzymes are proteinaceous in nature.

1. Collagen.
2. Ribulose-1, 5-bisphosphate carboxylase oxygenase.

Dehydration reaction.

Ruminants.

Watson and Crick proposed the double helical model of DNA structure. The two strands are antiparallel because they run in opposite directions, one in the 5' → 3' direction and the other in 3' → 5' direction.

Catalase catalyses the breakdown of hydrogen peroxide into water and oxygen.

Prosthetic groups are organic compounds and are distinguished from other cofactors in that they are tightly bound to the apoenzyme. They are the sites of active reaction.

4.5-5.0mM.

Ribose and Deoxyribose.

3. Lipid.

2. Nucleic acid.

Amino group and carboxylic group.

Chitin.

Cytosine.

Haemoglobin carries oxygen in the blood.

Polyunsaturated oils contain fatty acids having one or more double bonds, the clotting property of blood decreases due to high proportions of PUPA. Thus, the possibility of blockage is reduced.

Trihydroxy propane.

Rubber, Spices, Drugs, Pigments, etc.

DNA is a genetic material. It transfers hereditary characters from one generation to the next.

Their melting point.

The human body does not manufacture certain essential amino acids. Since, they are essential so it is necessary to take them through food supplement.

Co-enzymes are organic compounds and their association with the apoenzyme is only transient, usually occurring during the course of catalysis.

1. Non-equilibrium steady state.

In mouth, salivary amylase changes starch to maltose. Action of amylase stops in stomach as it cannot act in acidic medium.

Prosthetic group and coenzyme.

Inulin is the polymer of fructose.

1. Concanavaline A.
2. Lemon grass oil.

N-acetyl glucosamine is the basic unit of chitin.

Oil is non-polar and is not attracted to water. So, oil is not soluble in water.

Steroids and terpenes.

Six classes of enzymes are:

1. Oxidoreductases.
2. Transferases.
3. Hydrolases.
4. Lyases.
5. Isomerases.
6. Ligases.

Nitrogen and phosphorus.

Starch forms helical secondary structure and it can hold jodine in the helices; the starch-iodine complex is blue in colour.

Nitrogenous base, pentose sugar, phosphate.

Higher nucleotides.

Trichloroacetic acid is used for grinding animal tissue for chemical analysis of organic compounds.

Vinblastine and curcumin.

Glycogen in animals. Starch in plants.

Stachyose.

Temperature and pressure are the two physical factors that affects activity of an enzyme.

A system at equilibrium cannot work. But, living organisms have to work continuously and cannot afford to reach equilibrium, so living state is a non-equilibrium steady-state.

Paper making.

Apoenzyme works only in the presence of a cofactor or coenzyme.

Adenine and guanine.

Living state is defined as a non-equilibrium steady-state to be able to perform work.