Lysosomes

Q.

Describe the functions of Lysosomes.

Q.

Who discovered lysosomes?

Q.

Three of the following statements regarding cell organelles are correct while one is wrong. Which one is wrong?

1. Leucoplasts are bound by two membranes, lack pigment but contain their own DNA and protein-synthesising machinery

2. Endoplasmic reticulum consists of a network of membranous tubules and helps in transport, synthesis and secretion.

3. Sphaerosomes are single-membrane bound and are associated with the synthesis and storage of lipids.

4. Lysosomes are double-membraned vesicles budded off from the Golgi apparatus and contain digestive enzymes.

Q.

A single unit membrane surrounds the organelle:

1. Microsome

2. Chloroplast

3. Lysosome

4. Nucleus

Q. Which of the following are the functions of the lysosome?

1. Signalling
2. Excretion
3. Cell defense
4. $\mathrm{Cellular}\mathrm{scavenger}$
5. Autolysis
6. Molecular
   recycle
7. Transportation
8. Autophagy

Q.

Which of the following cell organelles store hydrolytic enzymes?

1. Centrioles

2. Chromoplasts

3. Chloroplasts

4. Lysosomes

Q.

Enzyme catalase is seen in:

1. Lysosome

2. Spherosome

3. Peroxisome

4. All of the above

Q.

Why are lysosomes known as ‘suicide-bags’ of a cell?

Q.

One of the following in enveloped with a single membrane

1. Mitochondrion

2. Lysosome

3. Chloroplast

4. Nucleus

Q.

Identify the organelle:

Q.

Lysosomes are formed by

1. Both 1 and 3 above

2. Golgi bodies

3. Mitochondria

4. Endoplasmic reticulum

Q. What type of enzymes is present in lysosomes?

Q.

WHY DOESNOT THE LYSOSOMAL ENZYME DESTROY ITS OWN CELL CYTOPLASM

Q. Which processes among the following involves the self destruction of the whole cell?

1. Autolysis
2. Autophagy
3. Phagocytosis
4. Exocytosis

Q. Interior of the lysosome has a/an __________ pH

1. Acidic
2. Neutral
3. Basic
4. Same as that of cytoplasm

Q.

Lysosomes are also called as___________.

1. Water bags

2. Suicide bags

3. Air bags

4. None of the above

Q.

proteins are digested in which part of the cell?

Q. Match column 1 with column 2 and choose the correct option.
$\begin{array}{cc}\text{Column 1}& \text{Column 2}\\ \text{A. Acrosome}& \text{1. Antrum}\\ \text{B. Tertiary follicle}& \text{2. Zona pellucida}\\ \text{C. Middle piece}& \text{3. Enzymes}\\ \text{D. Secondary oocyte}& \text{4. Mitochondria}\end{array}$

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

Q.

Which of the following contains certain parts of the cell in digestion under pathological conditions?

1. Autophagosomes

2. Residual bodies

3. Primary lysosomes

4. Secondary lysosomes

Q. Lysosomes are called ‘suicide bags of cell’ because they have

1. hydrolytic enzymes
2. parasitic activity
3. food vacuole
4. anabolic enzymes

Q.

Lysosomes keep the cells clean by digesting foreign materials.

1. True
2. False