Chitin, a complex polysachharide is found in:
1. Plant cell wall
2. The exoskeleton of arthropods and cell walls of most fungi
3. Bacterial cell wall
4. Cartilage and other connective tisuue

Given below is the structure of a monosaccharide. The homopolymer of this monosaccharide is used in:

1. Storage of carbohydrates in plants
2. Storage of carbohydrates in animals
3. Making the medium for microbial culture
4. Formation of the structure of the plant cell wall

Given below is the structure of a lipid. The excess of this compound in human blood can lead to:

1. Alzheimer’s disease
2. Phenylketonuria
3. Atherosclerosis
4. Rheumatoid arthritis

Shown below is a level of structural organization of a protein. Which of the following proteins attains its final form as this structure

1. Keratin

2. Fibroin

3. Tropo-collagen

4. Myoglobin

The following diagram depicts the structure of a:

1. Nucleoside

2. Nucleotide

3. Nitrogen containing Monosaccharide

4. Glycoprotein

What stage of the cell division is shown in the following diagram of a cell undergoing cell division?

1. Prophase I
2. Prophase II
3. Telophase I
4. Telophase II

Given below is the schematic representation of a typical cell cycle:
The duration of which of the stages shown is the diagram, according to you, is highly exaggerated with respect to other stages?

1. G1

2. G2

3. S

4. M

Given below is an electron microscopic structure of:

1. Cilium

2. Flagellum

3. Fimbria

4. Centriole

The following diagram shows

1. Formation of sperms from spermatogonia
2. Protein synthesis apparatus in eukaryotic cells
3. The endomembranous system of eukryotic cells
4. The cytoskeleton of a Moneran cell

A common characteristic feature of plant sieve tube cells and most of mammalian erythrocytes is