Practice Questions

TLS Online TPP Program

#Question id: 13125

Which of the following statements is consistent with the principle of competitive exclusion?

#Unit 10. Ecological Principles

Bird species generally do not compete for nesting sites.
The density of one competing species will have a positive impact on the population growth of the other competing species.
Two species with the same fundamental niche will exclude other competing species.
Even a slight reproductive advantage will eventually lead to the elimination of the less well adapted of two competing species

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TLS Online TPP Program

#Question id: 971

#Unit 1. Molecules and their Interaction Relevant to Biology

What is the source of the nitrogen atoms 3 and 9 during the de novo biosynthesis of purines?

TLS Online TPP Program

#Question id: 4078

#Unit 3. Fundamental Processes

Which of the following is (are) required for splicing to occur?

a. two transesterification reactions

b. intact, naturally occurring introns

c. formation of a lariat like structure

d. a branch-point G residue

TLS Online TPP Program

#Question id: 1131

#Unit 4. Cell Communication and Cell Signaling

Which of the following function(s) as an inhibitor of TGFβ signal transduction?

a. R-Smad b. I-Smad c. Co-Smad d. Ski e. SnoN

TLS Online TPP Program

#Question id: 18898

#Unit 13. Methods in Biology

Iodine-123, Iodine-125, Iodine-129, Iodine-131 are the radioactive compound having radioactive properties and used as for the diagnosis of

TLS Online TPP Program

#Question id: 12507

#Unit 8. Inheritance Biology

In this pedigree I 1 and II 2 have Becker muscular dystrophy which shows X-linked recessive inheritance. III 2 has oculocutaneous albinism which shows autosomal recessive inheritance with an incidence in the general population of 1 in 10 000. The disease status for both Becker muscular dystrophy and oculocutaneous albinism is unknown for IV 1 and IV 2.

What is the probability that III 3 is a carrier of Becker muscular dystrophy?