Which of the following proteins are likely to act as gene activators?
(a) factors X and Y
(b) factors X and Z
(c) factors Y and Z
(d) factor X only
Ans: (a) factors X and Y
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A mutation of a segmentation gene can result in
A. duplication of body parts. B. missing body regions. C. replacement of one body part with another. D. altered expression of homeotic genes. E. A segmentation gene mutation can cause all of these changes.
Evaporation is a cooling process and condensation is
What will be an ideal response?
The correct sequence of the stages of viral replication is:
a. Attachment - Synthesis - Penetration - Assembly - Release b. Penetration - Attachment - Assembly - Synthesis - Release c. Penetration - Attachment - Synthesis - Release - Assembly d. Attachment - Penetration - Assembly - Synthesis - Release e. Attachment - Penetration - Synthesis - Assembly - Release
What is a mutation?
A) a change in DNA that leads to death B) an inherited change in DNA sequences that is the source of all genetic variation C) an inherited change in a DNA sequence D) an inherited changed in DNA sequence that is always bad for an organism E) the source of all genetic variation