The Fundamental Unit of Life Test

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The Fundamental Unit of Life Test - 35

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Weekly Quiz Competition

Question 1
1 / -0

From the following, an organelle with ribosomes attached to its surface is:

A
Chloroplast

B
Rough endoplasmic reticulum

C
Smooth endoplasmic reticulum

D
Mitochondria

Solution

The endoplasmic reticulum (ER) is a network of tiny tubular structures. It is of two types on the basis of the presence and absence of ribosomes:
1. Rough ER (ribosomes are present) - helps in protein synthesis
2. Smooth ER (ribosomes are absent) - helps in lipid synthesis
So, the correct option Is B.
Question 2
1 / -0

Non-membrane bound cell organelle is?

A
Ribosomes

B
Centrioles

C
Nucleolus

D
All of these
Solution
- In a eukaryotic cell there are three types of cell organelles based on the presence or absence of the membrane:-
1. Single membrane bound cell organelles are bounded by single unit membranes- Endoplasmic reticulum (Rough & Smooth), Lysosomes, Peroxisomes, Golgi bodies, Vacuoles.
2. Double membrane bound cell organelles are- Mitochondria, Chloroplast, Nuclei.
3. Non-membrane bound cell organelles are- Ribosomes (70S & 80S), Centrosomes (include two centrioles), Microtubules, Basal bodies, Microfilaments.
- Nucleolus is a small round body comprising RNA and proteins inside a nucleus It is not a cell organelle but a structure present inside nucleus. Hence it don't have any membrane surrounding it.
So, the correct answer is option D.
Question 3
1 / -0

The smooth muscles in our body are_______.

A
Thin

B
Long

C
Tapering ends

D
All of the above
Solution
- The smooth muscles in our body are thin, long and tapering at the ends resembling a spindle.
- These are spindle shaped without striations and are found in walls of hollow organs such as stomach, intestine and blood vessels.
- Thus, Option D is correct.
Question 4
1 / -0

The cell membrane is selectively permeable, it can be best deduced by?

A
The entry of water

B
The entry of selective mineral salts

C
Both A and B

D
The rise of sap in plants

Solution

A selectively permeable membrane will allow free passage of solvent or water molecules, however, the entry of solute particles will be selectively allowed. In other words, not all but water and selected solute particles will be allowed to pass through.
Question 5
1 / -0

A single-celled organism like an amoeba can
i) capture and digest food
ii) respire
iii) excrete
iv) grow and reproduce

A
Only i) and ii)

B
Only i) and iv)

C
Only ii) and iii)

D
i), ii), iii) and iv)

Solution

A single-celled organism performs all the necessary functions that multicellular organisms perform. A single-celled organism, like an amoeba, captures and digests food, respires, excretes, grows and reproduces like any other multicellular organism.
The correct option is D.
Question 6
1 / -0

How do scientists observe and study living cells?

A
They use microscopes which magnify objects.

B
Stains (dyes) are used to colour parts of the cell to study the detailed structure.

C
Both A and B

D
They do not study living cells.

Solution

Since microorganisms are not visible to the naked eye, scientists observe them using a microscope and stain them to distinguish their structures.
Thus the correct answer is option C.
Question 7
1 / -0

The meaning of pseudopodia is

A
True feet

B
Multiple feet

C
False feet

D
Single foot

Solution

The projections of varying lengths protruding out of the body of an amoeba are called pseudopodia which mean false feet.
The correct option is C.
Question 8
1 / -0

Fill in the blank:
An organism with billions of cells begins life as a ________ which is the fertilised egg.

A
Embryo

B
Single-cell

C
Double-cell

D
None of the above

Solution

The fertilized egg is a single cell as two gametes with half the number of chromosomes fuse to give a cell with 23 pairs of chromosomes.
The correct option is B.
Question 9
1 / -0

What is the shape of the muscle cells?

A
Spindle

B
Spherical

C
Long and branched

D
Square

Solution

The muscle cells are spindle-shaped, RBCs are spherical while nerve cells are long and branched. There are no square-shaped cells.
Thus, the correct answer is option A.
Question 10
1 / -0

Which of the following is not a single-celled organism?

A
Amoeba

B
Paramecium

C
Elephant

D
Bacteria

Solution

Except for an elephant, all other are single-celled organisms, while an elephant is multicellular.
The correct option is C.

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Re-Attempt Weekly Quiz Competition

The Fundamental Unit of Life Test - 35

Result

The Fundamental Unit of Life Test - 35

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SHARING IS CARING

Question 1

Chloroplast

Rough endoplasmic reticulum

Smooth endoplasmic reticulum

Mitochondria

Solution

Question 2

Ribosomes

Centrioles

Nucleolus

All of these

Solution

Question 3

Thin

Long

Tapering ends

All of the above

Solution

Question 4

The entry of water

The entry of selective mineral salts

Both A and B

The rise of sap in plants

Solution

Question 5

Only i) and ii)

Only i) and iv)

Only ii) and iii)

i), ii), iii) and iv)

Solution

Question 6

They use microscopes which magnify objects.

Stains (dyes) are used to colour parts of the cell to study the detailed structure.

Both A and B

They do not study living cells.

Solution

Question 7

True feet

Multiple feet

False feet

Single foot

Solution

Question 8

Embryo

Single-cell

Double-cell

None of the above

Solution

Question 9

Spindle

Spherical

Long and branched

Square

Solution

Question 10

Amoeba

Paramecium

Elephant

Bacteria

Solution

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