Practice Questions

TLS Online TPP Program

#Question id: 5318

Humans have 23 pairs of chromosomes, and chimps have 24 pairs of chromosomes. What is the most likely explanation for these differences in human and chimp genomes?

#Unit 11. Evolution and Behavior

The common ancestor of humans and chimps had 24 pairs of chromosomes. During human evolution, two human chromosomes fused end to end.
In the evolution of chimps, new adaptations resulted from additional chromosomal material.
At some point in evolution, human and chimp ancestors reproduced with each other.
Errors in mitosis resulted in an additional pair of chromosomes in chimps.

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TLS Online TPP Program

#Question id: 4921

#Unit 8. Inheritance Biology

Shell coiling in snail determine by genetic maternal effect. S for dextral and s for sinistral. Following cross allowed between

Male	Female	Progeny (Genotype)
Dextral	sinistral	Dextral (K1)
Dextral	Sinistral	Sinistral (K2)
Sinistral	sinistral	Dextral (K3)
Dextral	Dextral	Sinistral (K4)

Which of the following progeny not have SS genotype?

TLS Online TPP Program

#Question id: 31267

#Unit 4. Cell Communication and Cell Signaling

Which of the following example belongs to the tumor-suppressor gene products?

TLS Online TPP Program

#Question id: 28040

#Unit 1. Molecules and their Interaction Relevant to Biology

Cyclic symmetries, Dihedral symmetries, Tetrahedral symmetry, Octahedral (cubic) symmetry, Icosahedral symmetry these symmetry arises as a result of

TLS Online TPP Program

#Question id: 21383

#Unit 12. Applied Biology

Auxin promote ___________ of DNA , which helps gaining totipotency for the callus formation.

TLS Online TPP Program

#Question id: 10855

#Unit 10. Ecological Principles

The incidence of Lyme disease is ultimately dependent on the abundance of