Cell The Unit of Life Test

Result

Cell The Unit of Life Test - 53

Score
-
out of -
Rank
-
out of -

TIME Taken - -

SHARING IS CARING

If our Website helped you a little, then kindly spread our voice using Social Networks. Spread our word to your readers, friends, teachers, students & all those close ones who deserve to know what you know now.

Weekly Quiz Competition

Question 1
1 / -0

Which cell organelles is involved in protein synthesis?

A
Chromosome

B
Lysosome

C
Ribosome

D
Mesosome

Solution

Ribosomes are the micro particles of ribonucleoprotein found in the cell, hence they are called RNP particles. These are the main sites of protein synthesis where synthesis of protein occurs. They are therefore called protein factory of the cell. Thus option C is the correct answer.
Question 2
1 / -0

Which of the following are present only in plant cells?
I. A nucleus II. A cell wall III. A cell membrane IV. Cytoplasm V. Chloroplasts.

A
II and V only

B
II and III only

C
I, III and IV only

D
II, III and IV only

Solution

Plant cells have cell wall. It provides rigidity to the plant. Animals lack cell wall.
Chloroplast is present in plant cells and is involved in photosynthesis. Hence plants are said to be autotrophs. Animal cells lack chloroplast and are heterotrophs.
Thus the correct answer is option A.
Question 3
1 / -0

Which of the following is the intracellular transport structure that helps in the protein and lipid synthesis?

A
Ribosomes

B
Microtubules and microfilaments

C
Golgi complex

D
Endoplasmic reticulum

Solution

The endoplasmic reticulum is of two types, smooth and rough. The smooth endoplasmic reticulum is involved in the production of the lipids and the hormone synthesis. The rough endoplasmic reticulum possess the ribosomes which help in the protein synthesis. The organelles is also involved in the transportation of these molecules.
Thus, the correct answer is option D.
Question 4
1 / -0

Which cell organelle is absent in an animal cell?

A
A nucleus

B
A cell wall

C
A large vacuole

D
Both B and C

Solution

Plants are eukaryotes with cell wall. Cell wall provides rigidity to plants. Animals lack cell wall.
Plant cells have large vacuoles that occupy a major portion of the cell. Vacuoles provide strength and mechanical support to the plant cell. Animal cells have small vacuoles.
Thus the correct answer is option D.
Question 5
1 / -0

Which cell organelle carries the functions of mechanical support, enzyme circulation, protein synthesis and detoxification of drugs?

A
Chromoplast

B
Chloroplast

C
Mitochondria

D
Endoplasmic reticulum

Solution

The endoplasmic reticulum is a network of numerous branched membranes from nuclear membrane to plasma membrane which is extensively spread in the cytoplasm. It acts as endoskeleton of the cell due to which mechanical support is provided to the cell. Endoplasmic reticulum works as a circulatory and transporting system for the circulation of substances in the cell. Rough endoplasmic reticulum helps in protein synthesis because ribosomes are present on it. Smooth endoplasmic reticulum mainly synthesises lipids and helps in the detoxification of drugs. Thus option D is the correct answer.
Question 6
1 / -0

Which cell organelle reduces the number of other organelles?

A
Endoplasmic reticulum

B
Mitochondria

C
Lysosome

D
Ribosome
Solution
- The lysosome is a membrane-bounded organelle found in animal cells. They contain hydrolytic enzymes that are capable of breaking down all types of biological polymers.
- When a cell dies or the organelle is damaged, the enzymes released by the lysosomes clears the cell debris and even it is able to break its own proteins by the process of autolysis and so-known as the suicide bags.
Thus, the correct answer is option C
Question 7
1 / -0

Which of the following organelles of a cell is responsible for mechanical support and enzyme transport?

A

B

C

D

Solution

The endoplasmic reticulum is the cellular organelle which is involved in the synthesis of the proteins and enzymes with the help of the ribosomes. The structures provide mechanical support to the cell. The vesicles produced by endoplasmic reticulum allows the transportation of the enzymes in the cell.
Thus, the correct answer is option B.
Question 8
1 / -0

In a humoral response, the main function of a B-cell is to make antibodies against antigens. Which organelle would be well represented in an electron micrograph of a such a cell?

A
Mitochondria

B
Peroxisomes

C
Lysosomes

D
Rough endoplasmic reticulum

Solution

Antibodies are proteins, usually consisting of heavy and light chains. Proteins are secreted by Rough Endoplasmic Reticulum, that are modified and packed in the Golgi. In case of micrograph for a cell that manufactures antibodies, should represent abundance of RER.
So, the correct answer is 'Rough endoplasmic reticulum'
Question 9
1 / -0

Which of the following characteristics distinguish the prokaryotes from eukaryotes?

A
The absence of membrane-bound organelles in prokaryotic cells

B
Smaller and less complicated eukaryotic cells

C
The presence of ribosomes in eukaryotic cells only

D
The method of nutrition

Solution

Membrane bound organelles are absent in prokaryotic cells, that is, a prokaryotic cell is not internally compartmentalized by endomembrane system for carrying out various functions. Instead all the functions are carried out by the cell membrane, while the genetic material is suspended in the cytoplasm.
So, the correct answer is 'The absence of membrane-bound organelles in prokaryotic cells'
Question 10
1 / -0

Which organelle digests or dissolves worn out organelles?

A
cell membrane

B
nucleus

C
lysosomes

D
mitochondria

E
vacuole
Solution
- Lysosomes are very minute round or irregularly shaped bag like particles containing enzymes which are bounded by membrane outside.
- Lysosomes help in the digestion of food substances brought by phagocytosis or pinocytosis processes and also dissolves worn-out organelles.
  Thus option C is the correct answer.