Cell Structure & Organelles MCQs with Answers

One-liner

Carbohydrates are not present in the enzyme active site, which is composed of amino acid residues rather than sugar molecules.

One-liner

Mesosomes are the folded invaginations of the prokaryotic cell membrane that perform functions analogous to mitochondria, including respiration and energy production.

One-liner

The longest stage of mitosis is Prophase, during which chromosomes condense and the nuclear envelope breaks down.

One-liner

The fluidity of the plasma membrane in eukaryotes is maintained by cholesterol, which acts as a fluidity buffer.

One-liner

Condensation of chromosomes reaches its maximum during Diakinesis, the final stage of Prophase I in meiosis.

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Almost all cellular reactions occur in the presence of water, which acts as a universal solvent and medium for biochemical processes.

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The nucleus controls the activities of a cell just as the brain controls the body.

One-liner

Enzymes are responsible for the assembly of proteins.

One-liner

Ribosomes are the protein factories of the cell, where amino acids are assembled into proteins based on the genetic code carried by mRNA.

One-liner

The smallest organelle in a cell is the ribosome, which measures about 20–30 nanometers in diameter.