Class 9 Quiz Level 3 (Difficult) – The Fundamental Unit of Life

Total questions: 10

Which of the following statements best explains the fluid mosaic model of the cell membrane?

Topic: Cell Membrane Dynamics

Deselect Answer

The cell membrane is a rigid structure composed of proteins and lipids.

The cell membrane is composed of a lipid bilayer with embedded proteins that can move laterally.

The cell membrane contains a static arrangement of carbohydrates and lipids.

The cell membrane is impermeable to all substances.

None

During which phase of mitosis do the chromosomes align at the cell's equatorial plate?

Topic: Cell Cycle

Deselect Answer

Prophase

Metaphase

Anaphase

Telophase

None

The phase of the cell cycle in which the cell prepares for mitosis is called:

Topic: Cell Division

Deselect Answer

G1 phase

S phase

G2 phase

M phase

None

The Calvin cycle occurs in which part of the chloroplast?

Topic: Photosynthesis

Deselect Answer

Thylakoid membrane

Stroma

Granum

Lumen

None

Apoptosis is a process of:

Topic: Apoptosis

Deselect Answer

Uncontrolled cell growth

Programmed cell death

Cellular differentiation

DNA replication

None

Which molecule acts as a second messenger in many signal transduction pathways?

Topic: Signal Transduction Pathways

Deselect Answer

ATP

AMP

DNA

RNA

None

Ribosomes are composed of:

Topic: Ribosomes

Deselect Answer

DNA and proteins

RNA and lipids

RNA and proteins

DNA and lipids

None

Which of the following is not a product of the light-dependent reactions of photosynthesis?

Topic: Photosynthesis

Deselect Answer

ATP

NADPH

Oxygen

Glucose

None

Which enzyme is responsible for unwinding the DNA helix during replication?

Topic: Nucleic Acids

Deselect Answer

DNA polymerase

Helicase

Ligase

Primase

None

10.

The genetic code is described as degenerate because:

Topic: Genetic Code

Deselect Answer

It has multiple codons for a single amino acid

It contains stop codons

It has start codons

universal

None

1 out of 10

Class 9 Quiz Level 3 (Difficult) – The Fundamental Unit of Life

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