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Cell Biology

Total questions: 20

Worksheet time: 20mins

Name

Class

Date

Which of the following macromolecule(s) constitute plasma membrane?

Proteins and lipids

cholesterol and proteins

Carbohydrates and nucleic acids

lipids, proteins, and carbohydrates

Lipids and Proteins in the membrane are held together by which of the following interactions?

Covalent bonds

Van der Waals forces

Hydrophobic interactions

Ionic bonds

How are proteins destined for the secretory pathway?

Proteins are directly released into the cytoplasm without any targeting signals.

Proteins are tagged with a carbohydrate chain to enter the secretory pathway.

Proteins are synthesized in the mitochondria for the secretory pathway.

Proteins are directed to the secretory pathway by a signal peptide that targets them to the endoplasmic reticulum.

Which of the following protein is involved in retrograde transport?

kinesin

myosin

tubulin

dynein

Which of the following is the retrieval signal of ER proteins?

KDEL

KDE

KEDL

DELK

Which of the following proteins aid in membrane fusion?

Transport proteins and channels

Receptors and enzymes

SNAREs and fusogenic proteins

Structural proteins and scaffolds

What is TOM/TIM complex?

A signaling pathway for apoptosis in cells

The TOM/TIM complex is a protein import system in mitochondria.

A type of mitochondrial enzyme involved in ATP synthesis

A method for DNA replication in mitochondria

In which of the following organelle protein transport, Ran-GTP is involved?

Golgi Apparatus

Nucleus

Mitochondria

Endoplasmic Reticulum

How are G proteins activated?

G proteins are activated by the binding of calcium ions.

G proteins are activated by the release of ATP from the cell.

G proteins are activated by the exchange of GDP for GTP upon receptor-ligand binding.

G proteins are activated by the phosphorylation of GDP.

10.

Which of the following is not a second messenger(s)?

Cyclic AMP

Calcium ions

Inositol trisphosphate

Insulin

11.

Which of the following receptors can activate phospholipase C?

Nuclear hormone receptors

G protein-coupled receptors (specifically those coupled to Gq) can activate phospholipase C.

Ionotropic receptors

Receptors that activate adenylate cyclase

12.

Which of the following receptor(s) are not bound to membrane?

G-protein coupled receptors

Ion channel receptors

Receptor tyrosine kinases

steroid hormone receptors

13.

Which of the following cytoskeletal elements are found only in animals?

Intermediate filaments

Microtubules

Centrioles

Actin filaments

14.

What is the role of motor proteins kinesin and dynein?

Kinesin and dynein are involved in cell division, not cargo transport.

Kinesin transports cargo toward the plus end of microtubules, and dynein transports cargo toward the minus end.

Both kinesin and dynein transport cargo in the same direction along microtubules.

Kinesin moves cargo toward the minus end of microtubules, and dynein moves cargo toward the plus end.

15.

Which of the following is a microtubule organising center?

Centrosome

Golgi apparatus

Mitochondria

Nucleus

16.

Which of the cytoskeletal elements help in cell motility?

Intermediate filaments and ribosomes

Actin filaments and lysosomes

Microtubules and cell membranes

Actin filaments and microtubules

17.

Which of the following is not a ECM protein?

Collagen

Elastin

Fibronectin

Lamin

18.

Which of the following is not a function of ECM proteins?

Facilitating cell adhesion

Participating in cellular respiration

Regulating gene expression

Providing structural support

19.

Connexin is an integral membrane component of which of the following junctions?

Tight junctions

Adherens junctions

Desmosomes

Gap junctions

20.

Which of the following is not a component of adheren junction?

Integrins

Claudins

Catenins

Cadherins

Reset

Cell Biology

Total questions: 20

Worksheet time: 20mins

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