In yolk-rich eggs, cytoplasmic localization of the yolk results in which of the following?
A. Yolk proteins concentrated at the animal pole
B. More cuts in the yolky part
C. Genetic material confined to the nucleus
D. Fewer cuts during cleavage in the vegetal pole
E. Reduced cytoplasm from the sperm
Answer: D
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What is epigenetic gene regulation?
a. regulation after translation b. regulation when RNA is processed and exported to the cytoplasm after it is transcribed c. regulation when the DNA is uncoiled and loosened at the nucleosomes to bind transcription factors d. regulation when RNA is translated to protein
As a seed germinates, its shoot points upward toward light, and its roots grow downward into the soil. Turn the plant sideways, and the stem and roots bend according to the new direction of gravity. How do roots and shoots grow in opposite directions as the plant is rotated?
A. The absorption of light by phytochromes only occurs in shoots. B. The roots and shoots respond oppositely to auxin. C. The circadian rhythms of roots and shoots are opposite. D. Statoliths move in the opposite direction of roots and shoots. E. through differences in thigmotropism
Lactate fermentation transfers the electrons and hydrogen ions carried by NADH directly to ____.
A. acetaldehyde B. pyruvate C. carbon dioxide D. oxygen E. myoglobin
Which of the following is the FIRST example of virus development in the complete absence of host cell contact?
a. production of long, thin tails by the Acidianus convivator virus ATV when released from the host cell b. replication by transposition by bacteriophage Mu c. segmentation of the genome by influenza A virus d. cell transformation by polyomavirus SV40