Class 9 Practice Level 2 – Set 2 – The Fundamental Unit of Life

Total questions: 25

Which protein is crucial for regulating the cell cycle?

Topic: Cell Cycle Regulation

Actin

Myosin

Cyclin

Tubulin

None

Chromatin is composed of:

Topic: Genetic Material

DNA and histone proteins

RNA and lipids

Proteins and carbohydrates

Nucleotides and ribosomes

None

Which type of transport does not require energy?

Topic: Membrane Transport

Active transport

Facilitated diffusion

Endocytosis

Exocytosis

None

Gap junctions are involved in:

Topic: Cell Communication

DNA replication

Cell-cell communication

Protein synthesis

Cellular respiration

None

Receptors on the cell membrane are primarily involved in:

Topic: Signal Transduction

Protein synthesis

Signal transduction

DNA replication

Lipid synthesis

None

The gradual loss of a cell's ability to divide and function is known as:

Topic: Cellular Aging

Apoptosis

Necrosis

Senescence

Differentiation

None

Peroxisomes are involved in:

Topic: Peroxisomes

Protein synthesis

DNA replication

Detoxification of harmful substances

Photosynthesis

None

Cytoplasmic streaming is observed in:

Topic: Cytoplasmic Streaming

Nucleus

Mitochondria

Chloroplast

Cytoplasm

None

The interaction between lysosomes and endosomes is essential for:

Topic: Organelle Interaction

Photosynthesis

Protein modification

Breakdown of ingested material

Lipid synthesis

None

10.

The genetic information within mitochondria is inherited from:

Topic: Genetic Information

Both parents

Only the father

Only the mother

Randomly

None

11.

The pigment chlorophyll is located in the:

Topic: Photosynthetic Organelles

Mitochondria

Chloroplast

Nucleus

Golgi Apparatus

None

12.

Eukaryotic cells are characterized by the presence of:

Topic: Eukaryotic Cells

Nucleus

Nucleoid

Plasmids

Capsule

None

13.

Muscle cells are specialized for:

Topic: Cell Specialization

Photosynthesis

Contraction

Secretion

Signal transduction

None

14.

The transport of proteins from the ER to the Golgi apparatus is facilitated by:

Topic: Intracellular Transport

Ribosomes

Vesicles

Microtubules

Actin filaments

None

15.

The technique used to insert a gene into a plasmid is called:

Topic: Genetic Engineering

Cloning

Transformation

Transcription

Replication

None

16.

Which factor limits the size of cells?

Topic: Cell Size and Surface Area

Number of mitochondria

Surface area-to-volume ratio

Amount of DNA

Number of ribosomes

None

17.

If the concentration of a solute inside a cell is 0.2 M and outside the cell is 0.5 M, which direction will the solute likely move, and by what process?

Topic: Diffusion

Into the cell by active transport

Out of the cell by diffusion

Into the cell by osmosis

Out of the cell by facilitated diffusion

None

18.

A cell with an internal salt concentration of 1% is placed in a 10% salt solution. What will happen to the cell?

Topic: Osmosis

The cell will swell

The cell will shrink

The cell will remain the same size

The cell will burst

None

19.

Calculate the surface area-to-volume ratio of a cubic cell with a side length of 2 µm.

Topic: Numerical - Surface Area-to-Volume Ratio

1.5 µm²/µm³

2 µm²/µm³

3 µm²/µm³

4 µm²/µm³

None

20.

A cell is placed in a solution containing 5 g of solute in 100 mL of water. Calculate the concentration of the solution in g/mL.

Topic: Numerical - Concentration Calculation

0.05 g/mL

0.1 g/mL

0.5 g/mL

1 g/mL

None

21.

Which of the following statements about active transport is true?

Topic: Active Transport

It requires energy in the form of ATP.

It moves substances down their concentration gradient.

It occurs through diffusion.

It does not involve membrane proteins.

None

22.

Which of the following organelles is involved in modifying, sorting, and packaging proteins for secretion?

Topic: Organelles

Mitochondria

Golgi apparatus

Lysosome

Nucleus

None

23.

If a spherical cell has a radius of 3 µm, what is the volume of the cell? (Use the formula for the volume of a sphere: V = 4/3πr³)

Topic: Numerical - Volume of a Cell

36 µm³

113.1 µm³

1134 µm³

904.3 µm³

None

24.

Which of the following best describes the cytoplasm?

Topic: Cytoplasm

A rigid structure providing support

A jelly-like substance that contains organelles

A storage area for waste products

A site for DNA replication

None

25.

In which organelle does the Krebs cycle take place?

Topic: Cellular Respiration

Nucleus

Chloroplast

Mitochondria

Ribosome

None

1 out of 25

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Class 9 Practice Level 2 – Set 2 – The Fundamental Unit of Life

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