A complex of ribosomes attached to a single strand of RNA is known as

(1) polymer

(2) polypeptide

(3) okazaki fragment

(4) polysome

Which of the following is not a feature of the plasmids?

(a) Circular structure

(b) Transferable

(c) Single-stranded

(d) Independent replication

Water soluble pigments found in plant cell vacuoles are

(1) chlorophylls

(2) carotenoids

(3) anthocyanins

(4) xanthophylls

Which of the following statements is not true for cancer cells in relation to mutations?

1. Mutations destroy telomerase inhibitor

2. Mutations inactivate the cell control

3. Mutations inhibit production of telomerase

4. Mutations in proto-oncogenes accelerate the cell cycle

Balbiani rings are sites of

1. lipid synthesis

2. nucleotide synthesis

3. polysaccharide synthesis

4. RNA and protein synthesis

Which of the following are not membrane-bound?

1. Vacuoles

2. Ribosomes

3. Lysosomes

4. Mesosomes

A protoplast is a cell

a.  without plasma membrane

b.  without nucleus

c.  undergoing division

d.  without cell wall

Cellular organelles with membranes are 

1. nuclei, ribosomes and mitochondria

2. chromosomes, ribosomes and endoplasmic reticulum

3. endoplasmic reticulum, ribosomes and nuclie

4. lysosomes, Golgi apparatus and mitochondria.

The chromosomes in which centromere is situated close to one end are

1. metacentric               

2. acrocentric

3. telocentric                 

4. sub-metacentric

Select the correct matching in the following pairs.

1. Smooth ER—Oxidation of phospholipids

2. Smooth ER—Synthesis of lipids

3. Rough ER—Synthesis of glycogen

4. Rough ER—Oxidation of fatty acids