Practice Questions

TLS Online TPP Program

#Question id: 2702

Which, if any, of the following statements is false?

#Unit 2. Cellular Organization

Unlike DNA, RNAs are unmethylated, and only the four standard bases – A, C, G and U are found in RNAs.
The primary structure of an RNA is the linear sequence of nucleotides.
The secondary structure of an RNA is dominated by hydrogen bonding between bases on the same strand.
Stem-loop structures are common in RNA and consist of complementary sequences that form stable base pairs, separated by a short sequence of unpaired bases.

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TLS Online TPP Program

#Question id: 27417

#Unit 1. Molecules and their Interaction Relevant to Biology

Which of the following is correct composition of mammalian or eukaryotic plasma membrane

Note = OML = outer mono layer, IML = inner mono layer

TLS Online TPP Program

#Question id: 27418

#Unit 1. Molecules and their Interaction Relevant to Biology

Inner monolayer of trans Golgi network is made up of

TLS Online TPP Program

#Question id: 27419

#Unit 1. Molecules and their Interaction Relevant to Biology

The distribution of lipids in the membranes of a typical cell Each membrane has its own characteristic composition, and the two monolayers of a given membrane may differ in composition hence choose which of the following is incorrect

Note = OML = outer mono layer, IML = inner mono layer

TLS Online TPP Program

#Question id: 27420

#Unit 1. Molecules and their Interaction Relevant to Biology

Which of the following membrane do not have cholesterol

1.Plasma membrane (E. coli)

2.Outer mitochondrial membrane (cauliflower)

3.Inner mitochondrial membrane (cauliflower)

4.Chloroplast inner membrane

TLS Online TPP Program

#Question id: 27421

#Unit 1. Molecules and their Interaction Relevant to Biology

Highest concentration of cholesterol are found in

TLS Online TPP Program

#Question id: 27422

#Unit 1. Molecules and their Interaction Relevant to Biology

There are two extreme states of bilayer lipids choose which of the following is correct

1.In the liquid- ordered (Lo) state, polar head groups are non uniformly arrayed at the surface, and the acyl chains are nearly motionless and packed with irregular

2.in the liquid- ordered (Lo) state, polar head groups are uniformly arrayed at the surface, and the acyl chains are nearly motionless and packed with regular

3.In the liquid-disordered (Ld) state acyl chains undergo much thermal motion and have regular organization.

4.In the liquid-disordered (Ld) state, acyl chains undergo much thermal motion and have no regular organization.