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TLS Online TPP Program

#Question id: 808

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

#Unit 1. Molecules and their Interaction Relevant to Biology

  1. RNA interference (RNAi) is a cellular defense mechanism that is triggered by the presence in cells of unnatural double-stranded RNA, as can occur after viral infections.

  2. RNAi therapy is a type of RNA-targeted therapy in which specific double-stranded RNA constructs are engineered to appear in diseased cells in order to incite the cells to destroy any RNA that contains the same sequence.

  3. By destroying RNAs that are related to a specifically introduced genetic construct, artificial RNAi is effectively a type of gene-specific silencing.

  4. RNAi therapy is best suited to silencing genes so as to replicate a phenotype caused by loss-of-function mutations.

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TLS Online TPP Program

#Question id: 10320

#Unit 1. Molecules and their Interaction Relevant to Biology

Following statements are regarding to archaeal lipids.
A. archaea have membrane lipids containing long-chain (32 carbons) branched hydrocarbons linked at each end to glycerol.
B. archaeal lipids are twice the length of phospholipids and sphingolipids, and can span the full width of the plasma membrane.
C. In archaeal lipids, at each end of the extended molecule is a polar head consisting of glycerol linked to either phosphate or sugar residues.
D. The glycerol moiety of the archaeal lipids is same as the stereoisomer as that in the lipids of bacteria and eukaryotes.
Which of the following statement is incorrect?
TLS Online TPP Program

#Question id: 10321

#Unit 1. Molecules and their Interaction Relevant to Biology

The human blood groups (O, A, B) are determined in part by the oligosaccharide head groups of these glycosphingolipids. Which of the following is correct?
TLS Online TPP Program

#Question id: 10322

#Unit 6. System Physiology – Plant

some of the enzyme of citric acid cycle with its co-factor given in below;


             ENZYMES

           CO-FACTOR

                  INHIBITORS

s) Citrate synthase

i) TPP

a) NADH

t) Succinate dehydrogenase

ii) NAD+

b) Monofluoroacetyl-CoA

u) Isocitrate dehydrogenase

iii) Co-A

c) Aresenite, Succinyl CoA, NADH

v) Malate dehydrogenase

iv) FAD

d) ATP

w) α-ketoglutarate dehydrogenase complex

v) NADP+, Mg2+, Mn2+

e) Malonate, Oxaloacetate

Find out the correct combination of Enzymes with its co-factor and inhibitor.
TLS Online TPP Program

#Question id: 10323

#Unit 9. Diversity of Life Forms

If this figure is an accurate depiction of relatedness, then which taxon is unacceptable, based on cladistics?


TLS Online TPP Program

#Question id: 10324

#Unit 9. Diversity of Life Forms

Which of the following is not true of all horizontally oriented phylogenetic trees, where time advances to the right?
TLS Online TPP Program

#Question id: 10325

#Unit 9. Diversity of Life Forms

Ultimately, which of these serves as the basis for both the principle of maximum parsimony and the principle that shared complexity indicates homology rather than analogy?