Cell Structure & Organelles MCQs with Answers

Motor proteins provide for molecular motion in cells by interacting with what types of cellular structures?

• A.Ribosomes
• B.Cytoskeleton
• C.Mitochondria
• D.Golgi apparatus

Cleavage leads to formation of a multicellular, hollow _?

• A.Blastula
• B.Gastrula
• C.Morula
• D.Zygote

What is the term for the process by which an organism develops from a single cell into a multicellular organism?

• A.Differentiation
• B.Development
• C.Metamorphosis
• D.Regeneration

Biomolecules are exclusively of which nature?

• A.Monomeric
• B.Metallic
• C.Ionic
• D.Polymeric

Euglena belongs to the kingdom Protista because _?

• A.It reproduces by seeds
• B.It is multicellular
• C.It has a cell wall made of chitin
• D.It is unicellular

Fibroblasts have receptors for this substance on their plasma membranes ?

• A.PDGF
• B.EGF
• C.FGF
• D.NGF

In competitive inhibition, the inhibitor

• A.Competes with substrate
• B.Binds to a site other than the active site
• C.Irreversibly destroys the enzyme
• D.None of these

Reactive parts of an amino acid are _?

• A.Hydroxyl group & sulfhydryl group
• B.Amino group & hydroxyl group
• C.Carboxyl group & phosphate group
• D.Amino group & carboxyl group

Active site continuously changes its shape until the substrate does bind to it, is statement of ?

• A.Lock and key model
• B.Fluid mosaic model
• C.Induced fit model
• D.Competitive inhibition model

Enzymes are sensitive to change in ?

• A.Temperature
• B.pH
• C.Substrate concentration
• D.All of these