Cell The Unit of Life Test

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Cell The Unit of Life Test - 78

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Weekly Quiz Competition

Question 1
1 / -0

Which of the following statement is incorrect?

A
Mitochondria, unless specifically stained are not easily visible under the microscope.

B
Physiology activity of cells determines the number of mitochondria per cell.

C
Mitochondria have DNA, RNA, ribosomes, and enzyme. So can survive outside the cell.

D
Mitochondria divide by fission.

Solution

Correct Option: C
Explanation:

a) Janus green stain is used to stain mitochondria and they are not easily visible under the microscope because of their small size.
b) If the cell is physiological is less active it will contain 1 or 2 mitochondria like in the unicellular organism and number is high in more physiological active cells like liver cells contains around 1000-2000 mitochondria per cell.
c) Mitochondria have DNA, RNA, ribosomes, and enzymes but they cannot survive outside the cell because their genetic material defined by its host and to maintain the physiological role they have to impart some proteins and enzymes from the host cell so they cannot survive outside the cell.
d) Mitochondria divide by binary fission as like bacteria.
So, the correct answer is 'Mitochondria have DNA, RNA, ribosomes, and enzyme. So can survive outside the cell'.
Question 2
1 / -0

How many of the following organisms have nuclear membrane ?
Mycoplasma, Blue - green algae, Fungi, Bacillus, Yeast, Purple photosynthetic bacteria, E.coli, Chlamydomonas

A
4

B
3

C
5

D
2

Solution

Yeast is a eukaryotic organism that has nucleus with nuclear membrane. Blue-green algae and Chlamydomonas belong to the kingdom Plantae that also have nuclear membrane. Bacteria is a prokaryote that does not have proper nucleus and thus nuclear membrane is absent.
So the correct answer is '3'.
Question 3
1 / -0

Membrane bound vesicular organelles formed by the process of packaging in the golgi apparatus is

A
Peroxisome

B
Glyoxysome

C
Lysosome

D
More than one option is correct

Solution

The vesicular membrane bound cell organelles formed from golgi apparatus are called lysosomes. They contain hydrolytic enzymes.
So the correct option is 'Lysosome'.
Question 4
1 / -0

In prokaryotic cells, respiration takes place in _______

A
Mitochondria

B
Cytoplasm

C
Ribosome

D
Nucleus

Solution

The prokaryotic cells do not have compartments or the organelles to carry out specific functions. The cytoplasm serves as the commonplace for the different cellular activities. The respiration in prokaryotic cells occurs in the cytoplasm.
A. Mitochondria are absent in prokaryotic cells. These are the site of respiration in eukaryotic cells.
B. Cytoplasm is the site of respiration in prokaryotic cells.
C. Ribosomes perform protein synthesis in both the prokaryotic and eukaryotic cells.
D. The nucleus is absent in prokaryotic cells.
Hence, the correct answer is 'Cytoplasm'
Question 5
1 / -0

Which of following is not common in chloroplast and mitochondria?

A
Both are present in animal cells

B
Both contain their own genetic material

C
Both are present in eukaryotic cells

D
Both are present in plant cells

Solution

Chloroplast is an organelle which is present in plant cells and green algae and carries out photosynthesis that converts light energy to chemical energy. It contains a pigment called chlorophyll and hence is green in color. This organelle is exclusively present in plant cells.
On the other hand, mitochondria are organelles present in both plant and animal cells and their primary function is to regulate cellular metabolism and cellular respiration to provide the organism with energy.
Hence, the correct answer is 'Both are present in animal cells'.
Question 6
1 / -0

The formation of polyribosomes from ribosomes is done in the presence of

A
$$Na^+ ions$$

B
$$K^+ ions$$

C
$$Ca^{2+} ions$$

D
$$Mg^{2+} ions$$

Solution

A clusters of ribosomes linked together by a molecule of messenger RNA and forming the site of protein synthesis called polysome or polyribosome. The formation of polyribosomes from ribosomes is done in the presence of sodium ions.
So the correct answer is '$$Na+$$'.
Question 7
1 / -0

Which organelle can be best describes as food processor and housekeeper of a cell?

A
Mitochondria

B
Plastids

C
Vacuoles

D
Lysosome

Solution

Lysosomes are the organelles that contain the hydrolytic enzymes required for the killing of any foreign particle in the cell. They also remove the undigested substances from the cell. Due to the presence of digestive enzymes, they also perform the function o food processing in cells of Amoeba.
A. Mitochondria are the powerhouse of the cell as they make ATP during aerobic respiration.
B. Plastids can act as the kitchen of the cell in the form of the chloroplast, storage in the form of leucoplast, and can have pigments in the form of chromoplasts.
C. Vacuoles are the cell sap storing organelles in plant cells.
D. Lysosomes are the food processors, housekeepers and also the suicidal bags.
Hence, the correct answer is 'Lysosome'
Question 8
1 / -0

The main organelle involved in modification and routing of newly synthesised proteins to their destination is ________

A
Mitochondria

B
Endoplasmic reticulum

C
Lysosome

D
Chloroplast

Solution

The main organelle involved in modification and routing of newly synthesized proteins to their destination is endoplasmic reticulum. It transports proteins to lysosomes, Golgi apparatus, plasma membrane. It basically works as manufacturing and packaging system.
Thus, the correct answer is 'Endoplasmic reticulum.'
Question 9
1 / -0

Complete the given table about absorption of nutrients through small intestine by selecting the correct option.
Process
Nutrients
Active transport III I and II Fructose and mannose
Simple Diffusion IV and V

A
$$I-$$Amino Acids,
$$II-Ca^{2+}$$,
$$III-$$Passive transport,
$$IV-$$Glycerol,
$$V-$$Fatty Acids

B
$$I-$$Galactose,
$$II-$$Amino Acids,
$$III-$$Passive transport,
$$IV-$$Vitamin C,
$$V-$$Water

C
$$I-$$Glucose,
$$II-$$Galactose,
$$III-$$Facilitated diffusion,
$$IV-$$Glycerol,
$$V-$$Water

D
$$I-$$Glucose,
$$II-$$Short chain fatty acids,
$$III-$$Facilitated diffusion,
$$IV-$$Water,
$$V-$$Vitamin B complex

Solution

* The absorption of digested food from the small intestine takes place by various methods;
* A small amount of glucose, amino acids, and some electrolytes like chloride ions are generally absorbed by simple diffusion.
* Fructose and some amino acids are absorbed with the help of the carrier ions like Na+. This mechanism is called the facilitated transport.
* Fatty acid and glycerols are absorbed in the form of micelle and chylomicrons.
* Transport of water depends upon the osmotic gradient.
Thus, the correct answer is option A.
Question 10
1 / -0

The thread like structure present in the nucleus is

A
Nucleolus

B
Gene

C
Chromosome

D
Ribosome

Solution

The thread like structures present in the nucleus are called the chromosomes or the chromatin, when the degree of condensation is very less.
A. Nucleolus is the region on the chromosomes that codes for the ribosomal RNA.
B. Genes are the segments of DNA that code for the proteins. These are located on the chromosomes.
C. The chromosomes are the thread like structures made up of DNA and proteins and are present in the DNA.
D. Ribosomes are the ribo-nucleoproteins present in the cytoplasm that take part in protein formation.
Hence, the correct answer is 'Chromosomes'

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Process	Nutrients
Active transport III	I and II Fructose and mannose
Simple Diffusion	IV and V

Cell The Unit of Life Test - 78

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Cell The Unit of Life Test - 78

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Question 1

Mitochondria, unless specifically stained are not easily visible under the microscope.

Physiology activity of cells determines the number of mitochondria per cell.

Mitochondria have DNA, RNA, ribosomes, and enzyme. So can survive outside the cell.

Mitochondria divide by fission.

Solution

Question 2

4

3

5

2

Solution

Question 3

Peroxisome

Glyoxysome

Lysosome

More than one option is correct

Solution

Question 4

Mitochondria

Cytoplasm

Ribosome

Nucleus

Solution

Question 5

Both are present in animal cells

Both contain their own genetic material

Both are present in eukaryotic cells

Both are present in plant cells

Solution

Question 6

$$Na^+ ions$$

$$K^+ ions$$

$$Ca^{2+} ions$$

$$Mg^{2+} ions$$

Solution

Question 7

Mitochondria

Plastids

Vacuoles

Lysosome

Solution

Question 8

Mitochondria

Endoplasmic reticulum

Lysosome

Chloroplast

Solution

Question 9

$$I-$$Amino Acids,$$II-Ca^{2+}$$,$$III-$$Passive transport,$$IV-$$Glycerol,$$V-$$Fatty Acids

$$I-$$Galactose,$$II-$$Amino Acids,$$III-$$Passive transport,$$IV-$$Vitamin C,$$V-$$Water

$$I-$$Glucose,$$II-$$Galactose,$$III-$$Facilitated diffusion,$$IV-$$Glycerol,$$V-$$Water

$$I-$$Glucose,$$II-$$Short chain fatty acids,$$III-$$Facilitated diffusion,$$IV-$$Water,$$V-$$Vitamin B complex

Solution

Question 10

Nucleolus

Gene

Chromosome

Ribosome

Solution

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$$I-$$Amino Acids,
$$II-Ca^{2+}$$,
$$III-$$Passive transport,
$$IV-$$Glycerol,
$$V-$$Fatty Acids

$$I-$$Galactose,
$$II-$$Amino Acids,
$$III-$$Passive transport,
$$IV-$$Vitamin C,
$$V-$$Water

$$I-$$Glucose,
$$II-$$Galactose,
$$III-$$Facilitated diffusion,
$$IV-$$Glycerol,
$$V-$$Water

$$I-$$Glucose,
$$II-$$Short chain fatty acids,
$$III-$$Facilitated diffusion,
$$IV-$$Water,
$$V-$$Vitamin B complex