Vacuoles

Q.

In Amoeba, osmoregulation occurs by

1. Hyaloplasm

2. Contractile vacuole

3. Ectoplasm

4. Pseudopodia

Q.

What are the four types of vacuoles?

Q.

Read the following statements and identify the correct options given.

(A) Sap vacuoles - contain digestive enzymes by which nutrients are digested

(B) Contractile vacuoles - take part in osmoregulation and excretion

(C) Food vacuoles - store and concentrate mineral salts as well as nutrients

(D) Air vacuoles - store metabolic gases and help in buoyancy of cells

1. A and B are correct.

2. Band D are correct.

3. A and C are correct.

4. B and C are correct.

5. B and C are correct.

Q.

Which out of the following is not a function of vacuole?

1. Storage

2. Providing turgidity and rigidity of the cell

3. Waste excretion

4. Locomotion

Q.

What is a tonoplast?

1. Inner membrane of chloroplast

2. Cell membrane of plant cells

3. Outer membrane of mitochondria

4. Membrane boundary of the vacuole of plant cells

Q.

The function of the vacuole in a cell is to store various substances including waste products of the cell.

1. True
2. False

Q.

The main function of gas vacuoles is to

1. Contain food

2. Hold cell sap

3. Help in respiration

4. Provide buoyancy

Q. Assertion :Amoeba contains a contractile vacuole. Reason: It helps in digestion.

1. Both assertion and reason are correct and reason is the correct explanation for assertion.
2. Both assertion and reason are correct but reason is not the correct explanation for assertion.
3. Assertion is correct but reason is incorrect.
4. Both assertion and reason are incorrect.

Q.

name the various types of vacuoles found in cells along with their functions?

Q. Osmoregulation is essential to all organisms as it maintains homeostasis of the organism's water content.
Osmoregulation in unicellular freshwater organisms like amoebas and paramecia involves an organelle called the contractile vacuole, which collects excess water as it accumulates in the cell and pumps it out. The graphs above plot contraction rate in contractile vacuoles vs. surrounding solution concentrations.
Which of the graphs correctly illustrates the results obtained when Paramoecium is placed in increasingly hypertonic solutions?

1. A
2. B
3. C
4. D

Q.

Why the trans face of the golgi apparatus is known as shipping side and cis face is known as receiving side ?

Q. Contractile vacuole in protozoan Amoeba is meant for

1. Respiration
2. Excretion
3. Locomotion
4. Osmoregulation

Q.

What are vacuoles?

Q. Which one of the following is associated with osmoregulation in Amoeba?

1. Endoplasm
2. Mitochondria
3. Contractile vacuole
4. Plasma membrane

Q. Amoeba differs from Entamoeba in having

1. Contractile vacuole
2. Pseudopodia
3. Ectoplasm
4. Cytostome

Q. In Amoeba, osmoregulation is carried out by

1. Food vacuole
2. Plasma membrane
3. Contractile vacuole
4. Both B and C

Q. Vacuole in a plant cell:

1. Lacks membrane and contains air
2. Lacks membrane and contains water and excretory substances
3. Is membrane-bound and contains storage proteins and lipids
4. Is membrane-bound and contains water and excretory substances

Q. Osmoregulation is a phenomenon associated with the regulation of osmotic pressure in the body.

1. True
2. False

Q. Choose the correct answers from the alternatives given.
What is the main function of contractile vacuoles in protozoa

1. Osmoregulation
2. Excretion
3. Reproduction
4. Food regulation

Q. Major function of contractile vacuole of Amoeba and others is

1. Circulation
2. Excretion
3. Osmoregulation
4. All of the above

Q. In protozoa, like Amoeba and Paramecium, an organ is found for osmoregulation, which is

1. Contractile vacuole
2. Mitochondria
3. Nucleus
4. Food vacuole

Q. Why is a vacuole not considered as a cell organelle?

Q. An amoeba, placed in medium with more salts than usual develops

1. Many contractile vacuoles
2. Small contractile vacuole
3. Large contractile vacuole
4. No contractile vacuole

Q.

Both lysosomes and vacuoles are endomembrane structures, yet they differ in terms of their functions. Comment.