The membrane of vacuole is called

1. plasma membrane

2. tonoplast

3. cytoplasm

4. tunicates

The osmotic expansion of a cell kept in water is chiefly regulated by

1. mitochondria

2. vacuoles

3. plastids

4. ribosomes

The contractile vacuole

Which of the following pair of organelles does not contain DNA?

1. Nuclear envelope and Mitochondria

2. Mitochondria and Lysosomes

3. Chloroplast and Vacuoles

4. Lysosomes and vacuoles

Vacuole in a plant cell:

Select the mismatch.

1. Gas vacuoles — Green bacteria Cells

2. Large central vacuoles — Animal cells

3. Protists — Eukaryotes

4. Methanogens — Prokaryotes

In plant cell the concentration of ions is more in

(1)cytoplasm

(2)vacuoles

(3)equal in both

(4)nucleus

Which of the following is true for vacuole

(1)It is present in both plants and animals

(2)Central vacuole is present in plant

(3)It occupies 90% volume of the plants

(4)All of these

Select the wrong statement about eukaryotic cells.

1. They have well defined nucleus

2. Possess 70S ribosomes

3. May have a cell wall

4. No organelles are single membrane bound

Read the statements carefully and select the set of correct statements

1. All except b

2. a & c

3. b & d

4. a & d