Practice Questions

TLS Online TPP Program

#Question id: 11171

Starlings often decorate their nests with sprigs of carrot leaves because

#Unit 10. Ecological Principles

It is a signal to other starlings to leave the nest site alone
The leaves interfere with the development of nest mites, a parasitic species
It camouflages the nest site
They are attracted to the green color

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TLS Online TPP Program

#Question id: 4725

#Unit 8. Inheritance Biology

Ptosis (droopy eyelid) may be inherited as a dominant human trait. Among 30 people who are heterozygous for the ptosis allele, 10 have ptosis and 20 have normal eyelids. What is the penetrance for ptosis?

TLS Online TPP Program

#Question id: 2720

#Unit 2. Cellular Organization

In one strand of a double stranded DNA the rate of occurrence of A is 3 times C in consecutive 10 bases. So how many G will be there in 100 base pairs of a DNA duplex? [Consider G=T in one strand].

TLS Online TPP Program

#Question id: 24217

#Unit 1. Molecules and their Interaction Relevant to Biology

Choose the correct statement of the following

a. In general, high acetyl-CoA or citrate are present, or when a high proportion of the cell’s adenylate is in the form of ATP, gluconeogenesis is favored.

b. When the level of AMP increases, it promotes glycolysis by stimulating PFK-1 by inhibiting FBPase-1

c. Phosphorylation of fructose 6-phosphate, catalysed by phosphofructokinase-2 (PFK-2)

d. Glucagon increases the cellular level of fructose 2,6 bisphosphate, stimulating glycolysis and inhibiting gluconeogenesis.

TLS Online TPP Program

#Question id: 2316

#Unit 2. Cellular Organization

Where are lysosomal enzymes stored in the cell?