What is the purpose of the two-hybrid system?
A) to study the nature of two hybrid organisms at a time
B) to study the interaction between an enhancer and a promoter
C) to explore a cDNA library to find interacting DNA sequences
D) to discover how and whether two proteins interact
E) to locate the chromosomal position of hybridized genes
D
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During fertilization, the acrosome _____
A) prevents polyspermy by releasing enzymes that destroy surrounding sperm B) digests the coatings surrounding the plasma membrane of the egg C) nourishes sperm mitochondria, increasing sperm motility D) injects the sperm nucleus into the egg during fertilization
What is the significance of activation energy?
What will be an ideal response?
Define, in your own words, the biological meaning of heritability
What will be an ideal response?
Anaerobic mammals:
a. lack mitochondria. b. have mitochondria and undergo respiration in the same manner as fungi. c. do not exist. d. keep their respiratory enzymes in their nucleus. e. Both a) and b) are correct.