Cell Structure & Organelles MCQs with Answers

The two chromatids are attached to each other at ?

• A.Kinetochore
• B.Centrosome
• C.Telomere
• D.Centromere

Which part of the cell is not present in both animals and plants?

• A.Cell wall
• B.Cell membrane
• C.Nucleus
• D.Cytoplasm

For every two K⁺ that are actively transported inwards, how many Na⁺ are pumped out of the cell?

• A.2
• B.1
• C.4
• D.3

Who proposed the Fluid Mosaic Model about the cell membrane?

• A.Schleiden and Schwann
• B.Watson and Crick
• C.Singer and Nicolson
• D.Davson and Danielli

Which of the following is a characteristic feature of a carrier protein in a plasma membrane?

• A.It forms a rigid channel for passive diffusion of water
• B.It is freely permeable to ions without any regulation
• C.It transports all types of molecules indiscriminately
• D.Having specificity for a particular type of molecule

Which of the following contains its own DNA and ribosomes?

• A.Endoplasmic reticulum
• B.Golgi apparatus
• C.Mitochondrion
• D.Lysosome

The most abundant compound present in the cell is ?

• A.Protein
• B.Water
• C.Lipid
• D.Carbohydrate

In acidic formulation lactic acid produced from ?

• A.Oxalic acid
• B.Citric acid
• C.Acetic acid
• D.Pyruvic acid

Choose the correct statement regarding lock and key model?

• A.Substrate modifies the enzyme's active site after binding
• B.Enzyme changes its shape to fit any substrate
• C.Enzyme and substrate possess specific complementary geometric shapes
• D.Enzyme and substrate have random non-specific interactions

Which country reconstructed a 3D ear made of living cells in June 2022?

• A.Germany
• B.China
• C.Japan
• D.USA