The Cell — Unit Of Life Mock Tests

34 questions available

The Cell — Unit Of Life Mock Test 1

Questions: 30

The Cell — Unit Of Life Mock Test 2

Questions: 4

Sample Questions

Class 11 Biology

In a prokaryotic cell, which of the following structures is absent?

A Ribosomes

B Nuclear envelope

C Plasma membrane

D Cell wall

Class 9 Science

The cell membrane is:

A Semi-permeable

B Fully permeable

C Impermeable

D Non-selective

Class 11 Biology

Plasmolysis in a plant cell occurs when:

A A plant cell is placed in a hypertonic solution and loses water by osmosis, causing the protoplast to shrink away from the cell wall

B A plant cell is placed in an isotonic solution

C A plant cell is placed in a hypotonic solution and swells

D A plant cell is heated to high temperatures

Class 11 Biology

Which of the following is NOT a function of the nucleolus?

A Synthesis of ribosomal RNA (rRNA) and ribosome subunit assembly

B DNA replication

C Production of rRNA

D Assembly of ribosomal subunits

Class 11 Biology

Which of the following statements about ribosomes is correct?

A Ribosomes are membrane-bound organelles found only in eukaryotic cells

B Ribosomes consist of rRNA and proteins, and they exist in both 80S (eukaryotic) and 70S (prokaryotic) forms

C Ribosomes are composed solely of RNA without any protein component

D Prokaryotic ribosomes are 80S while eukaryotic ribosomes are 70S

Class 11 Biology

The cell wall of a plant cell is primarily composed of:

A Cellulose

B Chitin

C Peptidoglycan

D Cellulose and pectin in the middle lamella, with cellulose as the main structural component

Class 11 Biology

Chromatin exists in two forms: euchromatin and heterochromatin. Which of the following correctly distinguishes between these two forms?

A Euchromatin is transcriptionally active and loosely packed, while heterochromatin is transcriptionally inactive and densely packed

B Heterochromatin is transcriptionally active and loosely packed, while euchromatin is transcriptionally inactive and densely packed

C Both euchromatin and heterochromatin are transcriptionally active

D Euchromatin is found only in the nucleus while heterochromatin is found only in the cytoplasm

Class 11 Biology

According to the fluid mosaic model of the cell membrane, which statement is correct?

A Phospholipids are static while proteins move freely

B Both lipids and proteins can move laterally but proteins are mostly integral or peripheral

C Proteins are fixed in place while phospholipids cannot move

D The membrane is a rigid structure with no fluidity

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