Practice Questions

TLS Online TPP Program

#Question id: 7279

X chromosome number alone is the primary sex determinant in normal drosophila because:

#Unit 5. Developmental Biology

The X chromosome contains genes encoding transcription factors that activate the critical gene in Drosophila sex determination.
Male and female parts and their sex-linked characters are activated by Y chromosome.
The number of X chromosome is greater than number of Y chromosome.
Only X chromosome is active, Y chromosome is inactive.

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TLS Online TPP Program

#Question id: 31370

#Unit 5. Developmental Biology

Which would lead to a ventralized embryo in drosophila?

TLS Online TPP Program

#Question id: 622

#Unit 1. Molecules and their Interaction Relevant to Biology

An enzyme-catalyzed reaction was carried out with the substrate concentration initially a thousand times greater than the Km for that substrate. After 9 minutes, 1% of the substrate had been converted to product, and the amount of product formed in the reaction mixture was 12 micromol. If, in a separate experiment, one-third as much enzyme and twice as much substrate had been combined, how long would it take for the same amount (12 micromol) of product to be formed?

TLS Online TPP Program

#Question id: 28311

#Unit 5. Developmental Biology

zona pellucida is made of glycoproteins, Which of the following zona pellucida or ZP protein is differentiating between mouse and human?

TLS Online TPP Program

#Question id: 33397

#Unit 1. Molecules and their Interaction Relevant to Biology

Which of the following characterises domains

a. Highly conversed and may be common in most unrelated proteins.

b. They do not evolve.

c. Can function Independently.

d. Average 100 amino acids.