Cell Structure And Functions Test

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Cell Structure And Functions Test - 7

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Weekly Quiz Competition

Question 1

1 / -0

Match the Group-I with Group-II.

Group-I (Cell organelle)	Group-II (Appropriate function)
P. Nucleus	1. Protein synthesis
Q. SER	2. Mechanical support
R. Ribosomes	3. Synthesis of lipids
S. Plasma membrane	4. Inheritance

P - 4, Q - 3, R - 1, S - 2

P - 2, Q - 1, R - 4, S - 3

P - 3, Q - 4, R - 1, S - 2

P - 1, Q - 3, R - 4, S - 2

P - 4, Q - 3, R - 2, S - 1

Solution

i. Nucleus is a dense protoplasmic body that contains hereditary information for controlling cell activities as well as for transfer to next generation. The nucleus contains genetic material DNA, so it is needed for the inheritance of characters from one generation to another. ii. Smooth endoplasmic reticulum is specialised to synthesise lipids and steroids. iii. Ribosomes help in protein synthesis inside the cell. iv. Plasma membrane is the outer covering of most of the animal cells, living, ultra thin, elastic, semipermeable in nature. It provides the mechanical support and external frame to the protoplasm (cytoplasm + nucleus).
Hence, the correct sequence of the codes is P - 4, Q - 3, R - 1, S - 2.

Question 2
1 / -0

Endoplasmic reticulum is involved in

P. Detoxification
Q. Ribosome formation
R. Lipid synthesis
S. Glycogenolysis

A
P, Q

B
Q, R

C
R, S

D
P, Q, R

E
P, R, S

Solution

The functions of endoplasmic reticulum are:
Detoxification: E.R helps in detoxification of many endogenous and exogenous compounds.
Glycogenolysis: Synthesis of glycogen occurs in the cytoplasmic matrix but the SER is involved in glycogenolysis.
Lipid synthesis: The SER is concerned with synthesis of lipid e.g. triglyceride. The membranes of SER also appear to be involved in the formation of lipoprotein complexes. The SER is also involved in the initial stages of the breaking down of fatty acids.
The nucleoli present in the nucleus helps in the formation of ribosomes.
Question 3
1 / -0

Which of the following is/are not the function(s) of lysosomes?
A. Destruction of foreign particles
B. Intracellular digestion
C. Protein synthesis

A
A only

B
B only

C
C only

D
A, B

E
B, C

Solution

A. Lysosomes help in the destruction of foreign particles (bacteria and viruses).
B. Lysosomes help in intracellular digestion of food particles.
C. Ribosomes help in protein synthesis inside the cell.
Question 4
1 / -0

Which of the following is the energy currency of a cell?

A
ATP

B
ADP

C
NAD

D
FAD

E
None of these

Solution

Adenosine triphosphate (ATP) is known as the energy currency of a cell.
Question 5
1 / -0

The energy required for various chemical activities needed for life is released by

A
golgi body

B
mitochondria

C
plastids

D
chloroplasts

E
vacuoles

Solution

Mitochondria is known as the powerhouse of a cell. The energy required for various chemical activities needed for life is released by mitochondria in the form of ATP (Adenosine triphosphate) molecules.
Question 6
1 / -0

Which of the following cell organelles is absent in animal cell as well as in fungi?

A
Endoplasmic reticulum

B
Mitochondria

C
Golgi body

D
Lysosomes

E
Plastids

Solution

Plastids are small bodies found free in the cytoplasm of most plant cells. They are absent in bacteria, fungi, cyanobacteria.
Question 7
1 / -0

Which of the following statements is/are correct about endoplasmic reticulum?
A. The endoplasmic reticulum is a large network of membrane bound tubes and sheets.
B. The transport of materials (especially proteins) between various regions of the cytoplasm or between the cytoplasm and the nucleus is the function of the endoplasmic reticulum.
C. In the pancreas cells of the vertebrates, smooth endoplasmic reticulum acts as detoxifying agent for poisons and drugs.

A
A only

B
B only

C
C only

D
A, B

E
B, C

Solution

A. The endoplasmic reticulum (ER) is a large network of membrane bound tubes and sheets.
B. The function of the endoplasmic reticulum is to serve as channels for the transport of materials (especially proteins) between various regions of the cytoplasm or between the cytoplasm and the nucleus.
C. In the liver cells of the group of animals called vertebrates, smooth endoplasmic reticulum plays a crucial role in detoxifying many poisons and drugs.

Question 8

1 / -0

Match Column-I with Column-II.

Column-I (Cell organelles)	Column-II (Functions)
1. Mitochondria	i. Protein synthesis
2. Ribosomes	ii. Lipid and fat synthesis
3. Golgi Apparatus	iii. Energy productiion through cellular respiration
4. SER	iv. Modification of proteins and lipids

1 - iii, 2 - i, 3 - iv, 4 - ii

1 - ii, 2 - iii, 3 - iv, 4 - i

1 - iii, 2 - iv, 3 - ii, 4 - i

1 - iii, 2 - iv, 3 - iii, 4 - ii

1 - i, 2 - ii, 3 - iii, 4 - iv

Solution

Mitochondria produces energy through the cellular respiration and so, called as the power house of the cell. Ribosomes synthesise proteins. Golgi apparatus functions to sort and modify proteins and lipids. SER (smooth endoplasmic reticulum) helps in lipid and fat synthesis. Hence, the correct answer is 1 - iii, 2 - i, 3 - iv, 4 - ii.

Question 9
1 / -0

Which of the following pairs is not correctly matched?

A
DNA - deoxyribonucleic acid

B
RNA - ribonucleic acid

C
ATP - adenosine triphosphate

D
ADP - adenosine diphosphate

E
NAD - nicotinamide dinucleotide

Solution

NAD is nicotinamide adenine dinucleotide.
Question 10
1 / -0

Identify the incorrect option for prokaryotic cell.

A
Size is 1 to 10 μm.

B
Double stranded DNA is present.

C
DNA is not associated with histone sugar.

D
Nucleolus is 0.01 to 0.5 μm in size.

E
Membrane bound cell organelles are absent.

Solution

Nucleolus is absent in prokaryotic cell.
Question 11
1 / -0

Identify the incorrectly matched pair(s) of 'cell organelle and corresponding function'.
P. Rough endoplasmic reticulum - Protein synthesis
Q. Mitochondria - ATP production
R. Chloroplast - Digestion of food particles

A
P only

B
Q only

C
R only

D
P, Q

E
Q, R

Solution

P. Rough endoplasmic reticulum is specialised to synthesise proteins. Q. Mitochondria is the site of cellular respiration leading to production of ATPR. Chloroplast stroma contains enzymes for conversion of carbon dioxide into carbohydrate. Lysosomes help in intracellular digestion of food particles.
Question 12
1 / -0

Among the following cells, the cell with the maximum length is

A
human nerve cell

B
bacterial cell

C
PPLO

D
human RBC

E
human liver cell

Solution

The longest cells are neurons (nerve cells) with a length of 90cm-100cm linking the central nervous system (brain and spinal cord) to other parts of the body.
Question 13
1 / -0

The term 'sarcode' was coined by

A
Robert Hooke

B
Robert Brown

C
Durjarden

D
Purkinje

E
Bowman

Solution

Durjarden used the term 'sarcode' for the cellular fluid, which was later on, named as "Protoplasm" by Purkinje and Von Mohl.

Question 14

1 / -0

Match the List A with List B and select the correct answer using the codes given below.

List A (Cell/cell organelle)	List B (Discovering scientists)
P. Golgi apparatus	1. Palade
Q. Ribosome	2. Bowman
R. Nucleolus	3. Camillo
S. Endoplasmic reticulum	4. Porter

P - 2, Q - 1, R - 4, S - 3

P - 3, Q - 1, R - 2, S - 4

P - 3, Q - 4, R - 1, S - 2

P - 4, Q - 3, R - 2, S - 1

P - 1, Q - 3, R - 2, S - 4

Solution

The Golgi apparatus, first described by Camillo Golgi, consists of a system of membrane bound vesicles arranged approximately parallel to each other in stacks called cisterns. These membranes often have connections with the membranes of ER and therefore constitute another portion of a complex cellular membrane system.
Ribosomes are submicroscopic dense granules about 150 to 2500 Angstrom in diameter and have been seen by Palade in 1955 under electron microscope.
The term 'nucleolus' was coined by Bowman in 1840.
Endoplasmic reticulum was discovered and named so by Porter. Endoplasmic reticulum is an interconnected system of membrane-lined channels that runs through the cytoplasm.
Hence, the correct answer is P - 3, Q - 1, R - 2, S - 4.

Question 15
1 / -0

Which of the following statements are false about mitochondria?
A. The term 'mitochondria' is given by Porter.
B. It is the power house of a cell.
C. It synthesises lecithin from fatty acids and glycerol.
D. It is double membrane organelle of the cell.

A
A only

B
D only

C
A, B

D
B, C

E
C, D

Solution

The term 'mitochondria' was coined by Carl Benda in 1898. It is double membrane organelle of the cell. The functions of mitochondria are:
1. Mitochondria are described as the power house of a cell, and therefore is directed to the processes that evolve energy, mainly TCA, ETS, oxidative phosphorylation. All these three processes occur in mitochondria and result in the formation of energy compound called ATP.
2. Some of the enzymes have been located in mitochondria, which help in the synthesis of lipids like Lecithin from fatty acids and glycerol.
3. Mitochondria help in the transport of ATP. They collect at sites where energy requirement is high.
4. Due to the presence of RNA, DNA and ribosomes, proteins can be manufactured in mitochondria.
5. Mitochondria possess some of the enzymes of glyoxylate cycle. This cycle is modification of Kreb's cycle in which fatty acids are converted into the carbohydrates. Endoplasmic reticulum was discovered and named so by Porter.
Question 16
1 / -0

Which of the following scientists discovered protoplasm?

A
Purkinje

B
Schleiden

C
Schwann

D
Virchow

E
Robert Brown

Solution

Purkinje coined the term 'protoplasm' for the fluid substance of the cell in 1839.
Question 17
1 / -0

Identify the false statement(s).
A. Plasma membrane is composed of lipids and proteins.
B. The cell wall is composed of lipids and phospholipids in plants and is located outside the cell membrane.
C. The nucleus in eukaryotes is covered by single-layered membrane.
D. Photosynthesis occurs in chloroplasts.

A
A only

B
A, B

C
B, C

D
C, D

E
D only

Solution

A. Cells are enclosed by a plasma membrane composed of lipids and proteins.B. In plant cells, a cell wall composed mainly of cellulose is located outside the cell membrane. In animal cell the cell wall is mainly composed of phospholipids and proteins.C. The nucleus in eukaryotes is separated from the cytoplasm by double-layered membrane and it directs the life processes of the cell.D. Chloroplasts contain the pigment chlorophyll and are responsible for photosynthesis
Question 18
1 / -0

Identify the false statement.

A
Leucoplast's function is the removing of dead and worn out cellular organelles.

B
Mitochondria are the sites of ATP production

C
Chloroplasts contain chlorophyll

D
Chloroplasts are the kitchen of the plant

E
The synthesis of melanin occurs in golgi complex.

Solution

Leucoplasts are primarily organelles in which materials such as starch, oils and protein granules are stored.
Lysosomes help in removing dead and worn out cellular organelles (cell debris) by digesting them.

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Cell Structure And Functions Test - 7

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Question 1

P - 4, Q - 3, R - 1, S - 2

P - 2, Q - 1, R - 4, S - 3

P - 3, Q - 4, R - 1, S - 2

P - 1, Q - 3, R - 4, S - 2

P - 4, Q - 3, R - 2, S - 1

Solution

Question 2

P, Q

Q, R

R, S

P, Q, R

P, R, S

Solution

Question 3

A only

B only

C only

A, B

B, C

Solution

Question 4

ATP

ADP

NAD

FAD

None of these

Solution

Question 5

golgi body

mitochondria

plastids

chloroplasts

vacuoles

Solution

Question 6

Endoplasmic reticulum

Mitochondria

Golgi body

Lysosomes

Plastids

Solution

Question 7

A only

B only

C only

A, B

B, C

Solution

Question 8

1 - iii, 2 - i, 3 - iv, 4 - ii

1 - ii, 2 - iii, 3 - iv, 4 - i

1 - iii, 2 - iv, 3 - ii, 4 - i

1 - iii, 2 - iv, 3 - iii, 4 - ii

1 - i, 2 - ii, 3 - iii, 4 - iv

Solution

Question 9

DNA - deoxyribonucleic acid

RNA - ribonucleic acid

ATP - adenosine triphosphate

ADP - adenosine diphosphate

NAD - nicotinamide dinucleotide

Solution

Question 10

Size is 1 to 10 μm.

Double stranded DNA is present.

DNA is not associated with histone sugar.

Nucleolus is 0.01 to 0.5 μm in size.

Membrane bound cell organelles are absent.

Solution

Question 11

P only