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Class 8 Practice – Level 3 – Set 2 – Cell Structure and Functions
Total questions: 15
1.
Which component of the cell membrane is primarily responsible for its fluidity?
Proteins
Carbohydrates
Cholesterol
Nucleic acids
None
2.
The primary function of the rough endoplasmic reticulum is:
Lipid synthesis
Protein synthesis
Energy production
Storage of nutrients
None
3.
What is the role of the cytoskeleton in eukaryotic cells?
To provide a site for protein synthesis
To maintain cell shape and facilitate movement
To store genetic material
To detoxify harmful substances
None
4.
In which part of the cell does protein synthesis occur?
Nucleus
Mitochondria
Ribosomes
Golgi apparatus
None
5.
What is the function of the cell wall in plant cells?
To store nutrients
To provide structural support and protection
To regulate cell division
To aid in photosynthesis
None
6.
During which phase of mitosis do the chromosomes line up at the cell's equatorial plane?
Prophase
Telophase
Anaphase
Metaphase
None
7.
What is the function of peroxisomes in a cell?
Energy production
Protein synthesis
Breakdown of fatty acids and detoxification
Photosynthesis
None
8.
Which structure in the cell is responsible for sorting and modifying proteins after they are synthesized?
Nucleus
Ribosome
Golgi apparatus
Endoplasmic reticulum
None
9.
What type of cellular transport requires energy?
Diffusion
Osmosis
Facilitated diffusion
Active transport
None
10.
The major site of ATP production in a cell is the:
Ribosomes
Golgi apparatus
Mitochondria
Nucleus
None
11.
Which of the following statements about plant cells is true?
They lack a cell wall.
They contain chloroplasts for photosynthesis.
They do not have a central vacuole.
They are prokaryotic in nature.
None
12.
What is the primary role of the vacuole in plant cells?
Protein synthesis
Energy production
Storage of substances and maintaining turgor pressure
Photosynthesis
None
13.
In cellular respiration, which molecule is broken down to release energy?
DNA
Glucose
Protein
Lipids
None
14.
Which of the following organelles is involved in the synthesis of lipids?
Rough endoplasmic reticulum
Smooth endoplasmic reticulum
Golgi apparatus
Ribosomes
None
15.
The fluid mosaic model describes:
The structure of ribosomes.
The arrangement of molecules in the cell membrane.
The organization of DNA in the nucleus.
The structure of the cytoskeleton.
None
1 out of 15
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