Cell Biology (Quiz 2)

Which is major structural protein of extracellular matrix?

• Pectin

• Collagen

• Peptidoglycan

• Pseudomurein

Fibrous structural proteins of extracellular matrix are embedded in gels formed of polysaccharides called _____.

• Glycosaminoglycans (GAGs)

• Collagen

• Cadherins

• Laminins

Glycosaminoglycans (GAGs) consists of repeating units of which disaccharide(s)?

• N-acetylglucosamine

• N-acetylgalactosamine

• Glucouronic/Idouronic acid

• All of the above

Which protein is principal adhesion protein of connective tissue?

• Collagen

• Laminins

• Fibronectin

• None of the above

Which are cell adhesion molecules?

• Selectins

• Integrins

• Imuunoglobulin (Ig) superfamily

• Cadherins

• All of the above

Which junctions are made up of connexin family of transmembrane proteins?

• Tight junctions

• Gap junctions

• Both (1) & (2)

• Neither (1) nor (2)

Adjacent plant cells communicate with each other through cytoplasmic connections called ___.

• Gap junctions

• Desmosomes

• Adherens junctions

• Plasmodesmata

Which organelle break variety of substances (including fatty acids, amino acid etc.) by oxidative reactions?

• Mitochondria

• Peroxisomes

• Chloroplast

• Endoplasmic reticulum

Which organelle has thylakoid membranes (site of light reaction) and stroma (site of dark reaction)?

• Mitochondria

• Plasmodesmata

• Chlorophyll

• Peroxisomes

Identify the major transmembrane proteins of tight junctions.

• Occludin

• Claudin

• Junctional adhesion molecule (JAM)

• All of the above