8th Grade > Biology
CELL - STRUCTURE AND FUNCTION MCQs
Total Questions : 55
| Page 3 of 6 pages
Answer: Option B. -> Mitochondrion
:
B
The mitochondrioniscalled the "powerhouse of the cell" because it is responsible forproducingenergy-richATP molecules. Cells use ATP for all their energy needs.
:
B
The mitochondrioniscalled the "powerhouse of the cell" because it is responsible forproducingenergy-richATP molecules. Cells use ATP for all their energy needs.
Answer: Option A. -> Smooth Endoplasmic Reticulum
:
A
Lipidsaresynthesised by the Smooth Endoplasmic Reticulum (SER), while the Rough Endoplasmic Reticulum (RER) synthesises proteins with the help of ribosomes attached to them.
:
A
Lipidsaresynthesised by the Smooth Endoplasmic Reticulum (SER), while the Rough Endoplasmic Reticulum (RER) synthesises proteins with the help of ribosomes attached to them.
Answer: Option A. -> True
:
A
There are various theories explaining the origin of life on Earth. However, most of the theoriesagree with the fact that life on Earth started from a single cell.
:
A
There are various theories explaining the origin of life on Earth. However, most of the theoriesagree with the fact that life on Earth started from a single cell.
Answer: Option D. -> All living cells have cell walls.
:
D
The main postulates of cell theory are:
• All living organisms are composed of one or more cells.
• Cell is the basic unit of structure, function, and organisation in all organisms.
• All cells come from pre-existing, living cells.
All living cells do not have cell walls. It is present only in plants, fungi and bacteria.
:
D
The main postulates of cell theory are:
• All living organisms are composed of one or more cells.
• Cell is the basic unit of structure, function, and organisation in all organisms.
• All cells come from pre-existing, living cells.
All living cells do not have cell walls. It is present only in plants, fungi and bacteria.
Answer: Option D. -> All living cells have cell walls.
:
:
Cells are highly organised in multicellular organisms. Not only is the rate of cell division controlled, but also the rate of cell death. If cells are no longer needed, they commit suicide by activating an intracellular death program. This process is therefore called programmed cell death or apoptosis.
Answer: Option A. ->
Robert Hooke
:
A
Robert Hooke in 1665 observed thin slices of cork under a simple magnifying device. He observed box-like structures and named them cells. This is because these structures reminded him of the cells in a monastery.
:
A
Robert Hooke in 1665 observed thin slices of cork under a simple magnifying device. He observed box-like structures and named them cells. This is because these structures reminded him of the cells in a monastery.
Answer: Option B. ->
Lysosomes
:
B
Lysosomes are called "suicide bags" of the cell because they have hydrolytic enzymes stored in them. These enzymes are used to digest complex molecules in a cell. When released into the cytoplasm, these enzymes can "digest" or destroy the cell itself. Therefore, they are called "suicide bags.
:
B
Lysosomes are called "suicide bags" of the cell because they have hydrolytic enzymes stored in them. These enzymes are used to digest complex molecules in a cell. When released into the cytoplasm, these enzymes can "digest" or destroy the cell itself. Therefore, they are called "suicide bags.
Answer: Option B. ->
Statement 3 is incorrect
:
B
Amoeba is a unicellular organism and can exist independently. It uses pseudopodia for locomotion and engulfing food. It can change its shape.
:
B
Amoeba is a unicellular organism and can exist independently. It uses pseudopodia for locomotion and engulfing food. It can change its shape.
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