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TLS Online TPP Program

#Question id: 784

Which is not a difference between B-DNA and A-DNA?

#Unit 1. Molecules and their Interaction Relevant to Biology

  1. A-DNA forms under more dehydrating conditions than B-DNA.

  2. For polynucleotide strands containing the same number of nucleotides, the A-DNA strand will be shorter from end-to-end than the corresponding B-DNA

  3. Both are helical, but B-DNA is right-handed and A-DNA is left-handed.

  4. The planes of the nitrogenous bases are not perpendicular to the helix axis in A-DNA.

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TLS Online TPP Program

#Question id: 1503

#Unit 4. Cell Communication and Cell Signaling

When the genes responsible for familial breast cancer were sequenced, it was found that the polypeptides they encoded contained a zinc finger motif. What does this suggest to you about the normal functions of the products of these genes?
TLS Online TPP Program

#Question id: 28049

#Unit 1. Molecules and their Interaction Relevant to Biology

Which of the following amino acids are likely to be present on the surface of a globular protein?
TLS Online TPP Program

#Question id: 5764

#Unit 8. Inheritance Biology

A wild-type chromosome can be represented as ABC * DEFGH, and from this a chromosomal aberration arises that can be represented AFED * CBGH. This is known as (* = centromere)
TLS Online TPP Program

#Question id: 1867

#Unit 4. Cell Communication and Cell Signaling

Which of the following is a coreceptor for HIV?
TLS Online TPP Program

#Question id: 12037

#Unit 7. System Physiology – Animal

Feelings of hunger can be stimulated by the hormone ________, but suppressed by the hormone ________.