Cell The Unit of Life Test

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Cell The Unit of Life Test - 83

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Question 1
1 / -0

A polymer of modified glucose that forms the structural component in arthropods and fungi

A
Cellulose

B
peptidoglycan

C
chitin

D
starch

Solution

Chitin is a polymer of modified glucose that is N-acetyl,D-glucosamine that forms the exoskeleton in arthropods and cell wall in fungi
So, the correct answer is 'chitin'
Question 2
1 / -0

Synthesis of lipids & carbohydrates is regulated by

A
SER

B
RER

C
Ribosomes

D
Lysosomes
Solution
- The smooth endoplasmic reticulum, or SER, is an organelle found in both animal cells and plant cells.
- Smooth ER consists of a long network of a folded, tube-like structure. The interior of the smooth ER is called the lumen, which is enclosed by a phospholipid membrane, just like the membrane that encloses the entire cell.
- Functions of the SER include synthesis of carbohydrates, lipids, and steroid hormones; detoxification of medications and poisons; and storage of calcium ions.
- Hence Synthesis of lipids & carbohydrates is regulated by SER.
- So, the correct answer is 'SER'.
Question 3
1 / -0

Which of these option are not a function of Ribosomes
(i) It helps in manufacture of protein molecules
(ii) It helps in manufacture of enzymes
(iii) It helps in manufacture of steroids
(iv) It helps in manufacture of starch molecules

A
(i) and (ii)

B
(ii) and (iii)

C
(iii) and (iv)

D
(iv) and (i)

Solution

Ribosomes are involved in protein synthesis. All enzymes are proteins, that may undergo some modification in the Golgi apparatus. So, ribosome helps synthesize proteins and enzymes.
Starch is produced in chloroplast as reserve food material in green plants.
Steroids are hormones synthesized from fats.
So, the correct answer is '(iii) and (iv)'
Question 4
1 / -0

Which of the following doesn't have any membranous covering?

A
Mitochondria

B
Vacuole

C
Ribosome

D
Chloroplast
Solution
- Mitochondria is a double-membrane-bound organelle found in most eukaryotic organisms.
- A vacuole is a membrane-bound organelle which is present in all plant and fungal cells and some protist, animal and bacterial cells.
- Ribosomes are non-membrane bound complex macromolecular machine which serves as the site of biological protein synthesis.
- Chloroplasts are double membrane-bound organelle that conducts photosynthesis and constitutes a high concentration of chlorophyll.
So, the correct answer is 'Ribosome'.
Question 5
1 / -0

Lysosomes are formed by:

A
Endoplasmic reticulum

B
Golgi apparatus

C
Nucleus

D
Mitochondria

Solution

Golgi apparatus processes lipids and proteins synthesized by the Endoplasmic Reticulum into forms as required for the functioning of the cell. This leads to formation of enzymes, hormones, signalling compounds, steroids etc. The hydrolytic enzymes processed by the Golgi are packed and released in the form of vesicles called the lysosomes.
So, the correct option is 'Golgi appartus'
Question 6
1 / -0

Which one of the following cell organelles is correctly matched with its function?

A
Ribosomes Synthesis of proteins

B
Mitochondria Secretion of enzymes

C
Plasma Membrane Freely permeable

D
Centrosome Carries genes

Solution

Ribosomes are small granules scattered in the cytoplasm, responsible for protein synthesis.
So, the correct answer is ' Ribosomes – synthesis of proteins'
Question 7
1 / -0

Both animal and plant cells have?

A
Chloroplast

B
Mitochondria

C
Centrioles

D
Large vacuole
Question 8
1 / -0

Choose the correct option for the statements given below regarding Leucoplasts.
Statement 1 - Aleuroplasts and Elaioplasts are types of Leucoplasts.
Statement 2 - Aleuroplasts store fats while Elaioplasts store proteins.

A
Both statements are correct.

B
Both statements are incorrect.

C
Statement 1 is correct but statement 2 is incorrect.

D
Statement 1 is incorrect but statement 2 is correct.

Solution

Leucoplasts are colorless or white plastids.
They are divided into three types based on the stored food material.
Amyloplasts store starch. (Example - Rice grains)
Aleuroplasts store proteins. (Example -Maize grains) and
Elaioplasts store fats (Example - Castor seeds)
So, the correct answer is 'Statement 1 is correct but statement 2 is incorrect.'
Question 9
1 / -0

Which of the following cell structures do not contain protein tubulin?

A
Centrioles

B
Endoplasmic reticulum

C
Cilia

D
Flagella

Solution

Centrioles are present in animal cells as a pair. They are made of microtubules. The microtubules are made of protein units called $$\alpha$$ tubulin and $$\beta$$ tubulin.
Centrioles form the basal body in both cilia and flagella.
Hence, protein tubulin is present in Centrioles, Cilia and flagella.
Endoplasmic reticulum is made of selectively permeable membrane similar to plasma membrane and hence, not associated with tubulin.
So, the correct answer is 'Endoplasmic reticulum.'
Question 10
1 / -0

Which of the following is an incorrect pair?

A
Nucleus- Brain of the cell

B
Mitochondria- Powerhouse of the cell

C
Chloroplast- Kitchen of the cell

D
Lysosome- Secretory granules

Solution

The nucleus is the brain of a cell, which controls the entire cell.
Mitochondria is the power house of cell because it is the site for formation and storage of energy in the form of ATP.
The chloroplast is the kitchen of the cell which contains chlorophyll pigment- helps in photosynthesis.
The lysosome is otherwise known as a suicidal bag. This is because of the presence of several hydrolytic enzymes which helps in the lysis of unwanted substances entering the cell and on high pH it can digest its own cell. Thus, the correct answer is option D.

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Re-Attempt Weekly Quiz Competition

Cell The Unit of Life Test - 83

Result

Cell The Unit of Life Test - 83

Score

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Rank

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SHARING IS CARING

Question 1

Cellulose

peptidoglycan

chitin

starch

Solution

Question 2

SER

RER

Ribosomes

Lysosomes

Solution

Question 3

(i) and (ii)

(ii) and (iii)

(iii) and (iv)

(iv) and (i)

Solution

Question 4

Mitochondria

Vacuole

Ribosome

Chloroplast

Solution

Question 5

Endoplasmic reticulum

Golgi apparatus

Nucleus

Mitochondria

Solution

Question 6

Ribosomes Synthesis of proteins

Mitochondria Secretion of enzymes

Plasma Membrane Freely permeable

Centrosome Carries genes

Solution

Question 7

Chloroplast

Mitochondria

Centrioles

Large vacuole

Question 8

Both statements are correct.

Both statements are incorrect.

Statement 1 is correct but statement 2 is incorrect.

Statement 1 is incorrect but statement 2 is correct.

Solution

Question 9

Centrioles

Endoplasmic reticulum

Cilia

Flagella

Solution

Question 10

Nucleus- Brain of the cell

Mitochondria- Powerhouse of the cell

Chloroplast- Kitchen of the cell

Lysosome- Secretory granules

Solution

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