Cell Structure and Functions Test

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Cell Structure and Functions Test - 24

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Weekly Quiz Competition

Question 1
1 / -0

Which of the following types of cell has a well-developed nucleus?

A
Prokaryotic

B
Eukaryotic

C
Both A and B

D
None of the above

Solution

Eukaryotic cells contain a membrane-bound nucleus. The nuclear membrane that surrounds nucleus in eukaryotic cells gives the defined structure to the nucleus which consists genetic material and thus eukaryotic nucleus is called a well-developed nucleus.
Prokaryotes lack a membrane bound nucleus.
Hence, the correct option is B.
Question 2
1 / -0

Tissue is formed by the combination of

A
Organs

B
Organ systems

C
Cells

D
Organisms

Solution

Tissues form by the combination of cells. Organs form by the combination of tissues and organ systems form by the combination of different organs. All the organ systems combine and forms an organism.
So, the correct answer is (C).
Question 3
1 / -0

Which of the following statements is true?

A
The structural unit of living things is molecule.

B
All animals are autotrophs.

C
All organisms reproduce sexually.

D
Organisms follow a life cycle of birth, growth, reproduction, ageing and death.
Solution
- All the living organism is made up of cells which constitute some organic and inorganic molecules and perform all the life process like nutrition (autotrophic or heterotrophic), reproduction (sexual or asexual), excretion.
- Each cell arises from pre-existing cells, they divide and increase their numbers and has a certain life span, thus they undergo aging and then death. Thus, the correct answer is option D.
Question 4
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Living organisms are grouped into eukaryotes and prokaryotes on the basis of ____________.

A
Nucleus

B
Ribosomes

C
Plasma membrane

D
None of the above

Solution

Eukaryotic cells have a well-defined nucleus with a nuclear membrane whereas prokaryotic cells do not have a well-defined nucleus and nuclear membrane. Apart from the nucleus, other membrane-bound organelles like mitochondria, lysosomes, and Golgi complex, etc. are also absent in prokaryotes. However, plasma membrane, cytoplasm, and ribosomes are present in both cell types.
Hence the correct option is A.
Question 5
1 / -0

Each cell of unicelluler organism performs certain functions such as____________

A
Nutrition

B
Transport

C
Excretion and reproduction

D
All of the above
Solution
- In unicellular (single-celled) organisms, the single cell performs all life processes for survival such as nutrition, transport, excretion, and reproduction.
- They do not depend on another cell for function and thus exist independently.

Question 6

1 / -0

The key difference in the animal and plant cells is:

Absence of cell wall in animals

Absence of plasma membrane in plants

Absence of cell wall in plants

There is no difference in their structure

Solution

The following table illustrates the difference between the structures of a plant cell and an animal cell.

Animal cells	Plant cells
Cell wall absent	Cell wall present
Chloroplast absent	Chloroplast present
Vacuoles are small	Vacuoles are large, sap-filled in plant cells

As evident, the key distinguishing feature is the presence of a cell wall in a plant cell while it is absent in an animal cell.

Therefore, the correct answer is option A.

Question 7
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"Division of labour" in multicellular animals means:

A
All functions are performed by a single type of cell.

B
A function is performed jointly by many cells.

C
Different functions are performed by different types of cells.

D
Different functions are performed at different times by a single cell type.
Solution
In a unicellular organism, a single cell has to perform all the functions necessary for its survival.
Multicellular organisms are made up of many cells. They show division of labor in which different cells are specialized to perform different functions.
For example: Red blood cells carry oxygen to different organs, nerve cells carry information from different parts of the body to brain and vice versa.
Thus, the correct answer is option C.
Question 8
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The jelly-like substance present between the cell membrane and the nucleus is called as

A
Cytoplasm

B
Ribosome

C
Golgi apparatus

D
All of the above

Solution

Cytoplasm is a thick solution that fills each cell. It is enclosed by the cell membrane. It is made up of water, salts and proteins. In eukaryotic cells, the cytoplasm includes all of the material inside the cell and outside of the nucleus. Hence, the correct answer is the option A.
Question 9
1 / -0

________ separates the interior contents of the cell from the outer membrane.

A
Cell membrane

B
Plasma membrane

C
Cytoplasmic membrane

D
All of the above

Solution

The cell membrane is the outer covering of a cell that separates the interior of the cells from the outside environment. The cell membrane is selectively permeable and controls the movement of substances in and out of the cells. The basic function of the cell membrane is to protect the cell from its surroundings. It is also called plasma membrane or cytoplasmic membrane.
Hence, the correct answer is option is D.
Question 10
1 / -0

_________ is generally spherical and located in the centre of the cell.

A
Cell membrane

B
Nucleus

C
Cytoplasm

D
None of these

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Cell Structure and Functions Test - 24

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Cell Structure and Functions Test - 24

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SHARING IS CARING

Question 1

Prokaryotic

Eukaryotic

Both A and B

None of the above

Solution

Question 2

Organs

Organ systems

Cells

Organisms

Solution

Question 3

The structural unit of living things is molecule.

All animals are autotrophs.

All organisms reproduce sexually.

Organisms follow a life cycle of birth, growth, reproduction, ageing and death.

Solution

Question 4

Nucleus

Ribosomes

Plasma membrane

None of the above

Solution

Question 5

Nutrition

Transport

Excretion and reproduction

All of the above

Solution

Question 6

Absence of cell wall in animals

Absence of plasma membrane in plants

Absence of cell wall in plants

There is no difference in their structure

Solution

Question 7

All functions are performed by a single type of cell.

A function is performed jointly by many cells.

Different functions are performed by different types of cells.

Different functions are performed at different times by a single cell type.

Solution

Question 8

Cytoplasm

Ribosome

Golgi apparatus

All of the above

Solution

Question 9

Cell membrane

Plasma membrane

Cytoplasmic membrane

All of the above

Solution

Question 10

Cell membrane

Nucleus

Cytoplasm

None of these

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