Cell Structure And Functions Test

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Cell Structure And Functions Test - 8

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Weekly Quiz Competition

Question 1
1 / -0

Which of the following cell component is without membrane?

A
Endoplasmic Reticulum

B
Ribosome

C
Lysosome

D
Nucleus

E
Plastids

Solution

Ribosomes are the protein manufacturing units of the cell. They are not bound by any membrane, but consist of a small and a large sub unit.
Question 2
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Which of the following are double-membrane-bound cell organelles?

A
Golgi complex, Vacuole, Nucleus

B
Centriole, Vacuole, Chloroplast

C
Nucleus, Mitochondria, Chloroplast

D
Centrosome, Centriole, Nucleolus

E
Mitochondria, Centrosome, Golgi complex

Solution

Nucleus, mitochondria and chloroplasts are cell organelles with double membrane. Centrosome, centriole and nucleolus are cell components without a membrane. Vacuole is a single-membrane-bound organelle.
Question 3
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Which of the following organisms do not have mitochondria?
(1) Green algae (2) Bacteria
(3) Fungal cells (4) RBC of mammals

A
1 and 2 only

B
2 and 3 only

C
2 and 4 only

D
1, 2, and 3 only

E
All of the above

Solution

Mitochondria are absent in both bacteria as well as RBC of mammals.
Question 4
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Which of the following pairs of 'cell organelle and discoverer' is not correct?

A
Ribosome – Palade

B
Lysosome – Duve

C
Centrosome – Boveri

D
Nucleolus – Robert Brown

E
Golgi apparatus – Camillo Golgi

Solution

Nucleolus was discovered by Felice Fontana.
Nucleus was discovered by Robert Brown.
Question 5
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Tonoplasts are ___________.

A
cellular organelles that contain acid hydrolase enzymes that break down waste materials and cellular debris

B
aggregation of several ribosomes held together by a single strand of m-RNA

C
differentially permeable membranes surrounding the vacuole

D
transmembrane glycoproteins, which are located in the membrane of the rough endoplasmic reticulum

E
the part of a cell that helps to organize microtubules and are involved in mitosis

Solution

Tonoplasts are differentially permeable membranes surrounding the vacuole.
Question 6
1 / -0

Which of the following are not true for ribosomes?
(1) Discovered by Palade
(2) Negatively charged particles
(3) Single membrane bounded cell organelle
(4) Site for fat synthesis

A
1 and 2 only

B
1 and 3 only

C
2 and 3 only

D
2 and 4 only

E
3 and 4 only

Solution

Ribosomes are cell organelles without membrane.
Ribosomes are the sites for protein synthesis.
Question 7
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Which of the following is not correctly matched?

A
Photorespiration - Peroxisome

B
ATP Synthesis - Ribosome

C
Production of ribosomal subunits - Nucleolus

D
Maintaining structure of the cell - Microtubules

E
Increasing surface area of plasma membrane - Mesosome

Solution

Mitochondria play a central role in making chemical energy available to the cell (ATP synthesis).
Ribosomes are the sites for protein synthesis.
Question 8
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Which of the following cell organelle was discovered by Altman?

A
Chondriosome

B
Centrosome

C
Microtubule

D
Vacuoles

E
All of the above

Solution

Mitochondria, at times referred to as chondriosomes were discovered by R. Altman.
Question 9
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Which of the following are semi-autonomous organelles?

A
Mitochondria and golgi apparatus

B
Chloroplast and mitochondria

C
Golgi apparatus and lysosomes

D
Chloroplast and golgi apparatus

E
Mitochondria and lysosomes

Solution

Although they exist within cells, chloroplasts and mitochondria are sometimes referred to as semi-autonomous organelles because they contain their own DNA and reproduce independently of the nucleus of the eukaryotic cell in which they are located.
Question 10
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Which of the following statements is FALSE regarding mitochondria?

A
Mitochondria are a cell organelle with electron transport system.

B
The outer and inner membranes of mitochondria are made up of proteins and phospholipids.

C
Synthesis of ATP in mitochondria takes place in the cristae.

D
The enzymes for Krebs cycle in mitochondria are located in perimitochondrial space.

E
Mitochondria are yellow in colour due to the presence of riboflavin.

Solution

The Krebs cycle enzymes are soluble proteins located in the mitochondrial matrix space, except for succinate dehydrogenase, which is an integral membrane protein that is firmly attached to the inner surface of the inner mitochondrial membrane, where it communicates directly with components in the respiratory chain.
Question 11
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Which of the following statement is incorrect?

A
Acrosomes are produced by Golgi complex.

B
The principal protein of cilia and flagella is globulin.

C
Centrosome is responsible for initiation of cell division.

D
The site for detoxification reaction in liver is SER.

E
Cellular organelles containing hydrolytic enzymes are lysosomes.

Solution

The principal protein of cilia and flagella is tubulin.
Question 12
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Transcription occurs in ___________.

A
heterochromatin

B
euchromatin

C
nuclear envelope

D
nuclear pore

E
nucleolus

Solution

Euchromatin participates in the active transcription of DNA to mRNA products.
Question 13
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Which of the following is the wrong statement?

A
ER is attached with nuclear membrane.

B
The strength and rigidity of cell wall is due to cellulose.

C
Enzymes found in lysosomes are hydrolytic enzymes.

D
Steroidal hormone is synthesized by smooth ER.

E
Aleuroplasts are protein storage plastids.

Solution

The strength and rigidity of cell wall is due to lignin.The Endoplasmic Reticulum (ER) is very extensive, extending from the cell membrane through the cytoplasm and forming a continuous connection with the nuclear envelope.The lysosome is a membranous bag which contains hydrolytic enzymes that are used to digest macromolecules.The smooth endoplasmic reticulum synthesizes steroid hormones, like cholesterol. Other functions of the smooth endoplasmic reticulum include the making of lipids or fats, which is important for the stability of the cell membrane.
Question 14
1 / -0

Consider the following statements regarding eukaryotic cells. Which of the following is/are incorrect?
1. Transcription occurs in nucleus while translation takes place in cytoplasm.
2. Nuclear DNA is circular while extranuclear DNA is linear.
3. Endoplasmic reticulum and Golgi bodies are absent.

A
1 only

B
1 and 2 only

C
1 and 3 only

D
2 and 3 only

E
All of the above

Solution

Nuclear DNA is linear while extranuclear DNA is circular in eukaryotic cells.
Endoplasmic reticulum and Golgi bodies are present in eukaryotic cells.
Question 15
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Consider the following statements regarding plant cell. Which of the following is/are false?
1. Plant cells have a rigid cell wall on the outside.
2. Spindle formed during nuclear division is amphistral.
3. Reserve food material is generally starch.
4. Plastids are usually absent.

A
1 and 2 only

B
1 and 3 only

C
2 and 3 only

D
2 and 4 only

E
2, 3, and 4 only

Solution

In plants, spindle formed during nuclear division is anastral.
Plastids are found in plant cells.
Question 16
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Fluid mosaic model of cell membrane is given by ____________.

A
Plowe

B
Nageli and Cramer

C
Davson and Danielli

D
Robertson

E
Singer and Nicolson

Solution

Fluid mosaic model of cell membrane is given by Singer and Nicolson. In this model, a flexible layer made of lipid molecules is interspersed with large protein molecules that act as channels through which other molecules enter and leave the cell.
Question 17
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Which of the following is not a common feature of both mitochondria and chloroplasts?

A
Semi-autonomous organelles

B
Enveloped by two unit membranes

C
Presence of thylakoid membranes

D
Presence of circular DNA and three types of DNA

E
Energy transducing organelles

Solution

Chloroplast contains thylakoid membranes and pigment molecules, which are not found in mitochondria.
Question 18
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All of the following are parts of prokaryotic cells, except _________.

A
mitochondria

B
plasmids

C
ribosomes

D
vacuoles

E
vesicles

Solution

Prokaryotic cells lack membrane bound organelles, such as mitochondria, ER, Golgi apparatus, etc.
Question 19
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Lysosomes and vesicles originate from __________.

A
smooth ER

B
rough ER

C
Golgi apparatus

D
Mitochondria

E
Nucleus

Solution

Both lysosomes and vesicles originate from Golgi apparatus.
Question 20
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Which of the following functions is not associated with smooth ER?

A
Regulation of calcium ions

B
Detoxification in liver cells

C
Transportation of newly synthesised lipids and proteins

D
Synthesis of proteins

Solution

The rough endoplasmic reticulum is studded with ribosomes. These are the sites of protein synthesis.

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Cell Structure And Functions Test - 8

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Cell Structure And Functions Test - 8

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Question 1

Endoplasmic Reticulum

Ribosome

Lysosome

Nucleus

Plastids

Solution

Question 2

Golgi complex, Vacuole, Nucleus

Centriole, Vacuole, Chloroplast

Nucleus, Mitochondria, Chloroplast

Centrosome, Centriole, Nucleolus

Mitochondria, Centrosome, Golgi complex

Solution

Question 3

1 and 2 only

2 and 3 only

2 and 4 only

1, 2, and 3 only

All of the above

Solution

Question 4

Ribosome – Palade

Lysosome – Duve

Centrosome – Boveri

Nucleolus – Robert Brown

Golgi apparatus – Camillo Golgi

Solution

Question 5

cellular organelles that contain acid hydrolase enzymes that break down waste materials and cellular debris

aggregation of several ribosomes held together by a single strand of m-RNA

differentially permeable membranes surrounding the vacuole

transmembrane glycoproteins, which are located in the membrane of the rough endoplasmic reticulum

the part of a cell that helps to organize microtubules and are involved in mitosis

Solution

Question 6

1 and 2 only

1 and 3 only

2 and 3 only

2 and 4 only

3 and 4 only

Solution

Question 7

Photorespiration - Peroxisome

ATP Synthesis - Ribosome

Production of ribosomal subunits - Nucleolus

Maintaining structure of the cell - Microtubules

Increasing surface area of plasma membrane - Mesosome

Solution

Question 8

Chondriosome

Centrosome

Microtubule

Vacuoles

All of the above

Solution

Question 9

Mitochondria and golgi apparatus

Chloroplast and mitochondria

Golgi apparatus and lysosomes

Chloroplast and golgi apparatus

Mitochondria and lysosomes

Solution

Question 10

Mitochondria are a cell organelle with electron transport system.

The outer and inner membranes of mitochondria are made up of proteins and phospholipids.

Synthesis of ATP in mitochondria takes place in the cristae.

The enzymes for Krebs cycle in mitochondria are located in perimitochondrial space.

Mitochondria are yellow in colour due to the presence of riboflavin.

Solution

Question 11

Acrosomes are produced by Golgi complex.