A single-stranded DNA molecule contains 40 nucleotides with equal amounts of A, C, G, and T. This DNA strand can combine with a complementary DNA strand to form a double-stranded DNA molecule. Which of the following double-stranded DNA molecules would denature at a lower temperature than the 40 base-pair double-stranded molecule described above?

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#Question id: 11574

#Unit 7. System Physiology – Animal

Glucocorticoids do which of the following?

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#Question id: 6991

#Unit 5. Developmental Biology

Metamorphosis of amphibians is triggered by environmental cues that act on the:

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#Question id: 801

#Unit 1. Molecules and their Interaction Relevant to Biology

Identify the type of DNA from the structures given below and match the correct form with its characteristics described.

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#Question id: 33522

#Unit 2. Cellular Organization

Alignment of two entire genome sequences and comparison of the locations of orthologs is done by

A. BLAST

B. MUMmer

C. InterPreTS

D. ProtoNet

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#Question id: 14836

#Unit 5. Developmental Biology

In the case of the French flag model. we assume a source of morphogen at one end and a sink at the other and that the concentrations of morphogen at both ends are kept constant but are different from each other. If the cells can respond to threshold concentrations of the morphogen, Thresholds can represent the

a. amount of morphogen that must bind to receptors to activate an intracellular signaling system. 

b. concentrations of transcription factors required to activate particular genes.

c. concentration at any point effectively provides positional information.

d. amount of morphogen that must bind to receptors to inactivate an extracellular signaling system.