Practice Questions

TLS Online TPP Program

#Question id: 1317

Which of the following statement is true for the gap junctions?

#Unit 4. Cell Communication and Cell Signaling

Made up of two subunits of connexons.
Movement of gases takes place freely.
It is made up of connexin protein.
Allows free movement of large molecules across cells.

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TLS Online TPP Program

#Question id: 29059

#Unit 10. Ecological Principles

which of the following factor are responsible for the adaptation of water viscosity?

a) large appendages

b) small aquatic organism

c) streamlined shapes

TLS Online TPP Program

#Question id: 21390

#Unit 12. Applied Biology

Suspension culture used for___

TLS Online TPP Program

#Question id: 33698

#Unit 2. Cellular Organization

Globin gene clusters are found on chromosomes

TLS Online TPP Program

#Question id: 980

#Unit 1. Molecules and their Interaction Relevant to Biology

Which enzyme catalyzes the step in purine nucleotide biosynthesis that is the principal site of regulation for the pathway?

TLS Online TPP Program

#Question id: 2581

#Unit 2. Cellular Organization

Match the following toxins (Column I) with their effects (Column II) on actin.

Column I	Column II
A. Cytochalasin D	i. Enhances nucleation by binding and stabilizing actin dimers and thereby lowering the critical concentration.
B. Latrunculin	ii. Binds at the interface between subunits in F-actin, locking adjacent subunits together and preventing actin filaments from depolymerizing.
C. Jasplakinolide	iii. Depolymerizes actin filaments by binding to the (+) end of F-actin, where it blocks further addition of subunits.
D. Phalloidin	iv. Binds and sequesters G-actin, inhibiting it from adding to a filament end.