Practice Questions

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#Question id: 7266

After brief examination of the evolution of the tetrapod limb, from fish fins to human hands, has hopefully illuminated the importance of Hox gene regulation during limb development. Hox genes are critical for:

#Unit 5. Developmental Biology

Specifying fates along each axis of the limb, and their expression is under the influence of signals emanating from the flank (proximal) and AER (distal), among others.
Specifying fates along proximal-distal axis of the limb, and their expression is under the influence of signals emanating from the flank (proximal) but not from AER (distal).
Specifying fates along each axis of the limb, by maintaining the expression of retinoic acid distally.
Specifying fates along proximal-distal axis of the limb, and their expression is under the influence of signals emanating from the AER (proximal).

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TLS Online TPP Program

#Question id: 22946

#Unit 5. Developmental Biology

FLOWERING LOCUS C (Floral repressor) that is expressed in Leaves and apex, belongs to which, transcription factor family

TLS Online TPP Program

#Question id: 15667

#Unit 8. Inheritance Biology

You set up the following dihybrid mapping cross in fruit flies.

P e+e+ roro cq cq x ee ro+ro+ cq+cq+. After backcrossing F1 males to ee roro cq cq females, you get the following results: gray body, rough eyes, claret eyes 576; ebony body, smooth, red eyes 564. How can you explain this result?

TLS Online TPP Program

#Question id: 19180

#Unit 13. Methods in Biology

If two successive PCRs are carried out, in which PCR there are chances of having a non-specific product?

TLS Online TPP Program

#Question id: 749

#Unit 1. Molecules and their Interaction Relevant to Biology

Which of the following is correct for the A form of DNA structures?

TLS Online TPP Program

#Question id: 1260

#Unit 4. Cell Communication and Cell Signaling

Which of the following statement regarding RTK/Ras pathway is incorrect?