Cell Biology

1. Which statement is incorrect?

Down’s syndrome involves autosome

In Turner’s syndrome 2n-1

In Klinefelter’s syndrome XYY

In Down’s syndrome sperms are commonly involved

2. Which is a feature of the malignant tumor?

Localized

Little deleterious effects

Few mitoses

Metastasize

3. Ribosomes + m-RNA

Polysome

Phagosome

Polisome

None of these

4. A cell of a human being has 46 chromosomes; it divides to form some daughter cells, each having 23 pairs of chromosomes. The division would be

Mitosis

Meiosis

Amitosis

Budding

5. In plants, mitotic apparatus consists of

Centriole

Centriole and asters

Centrioles, asters, and spindles

Spindles only

6. This Structure Tends to Vanish Always During Meiosis and Mitosis

Plastids

Plasma Membrane

Nucleolus and Nuclear Membrane

All of these

7. The 60S and 40S subunit combine to form ______ particle

100 S

90 S

80 S

70 S

8. The part of chloroplast where CO2 is fixed to manufacture sugar is

Stroma

Grana

Thylakoid

Outer membrane

9. Percentage of proteins in the cell membrane is

20-40%

40-50%

60-80%

80-100%

10. Mitosis occurs in

Diploid cells only

Haploid cells only

Both diploid and haploid cells

Monoploid cells

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