QUESTION 7
What is the purpose of gap junctions?
A. To prevent the leakage of extracellular fuid.
B. To provide cytoplasmic channels between adjacent plantcells.
C. To fasten cells together.
D. To provide cytoplasmic channels between adjacent animalcells.
QUESTION 8
During which phase of the cell cycle do homologous pairs ofchromosomes line up on the metaphase plate?
A. Metaphase III
B. Metaphase I
C. Metaphase
D. Metaphase II
QUESTION 9
Which one of the following is NOT a mechanism that contributesto genetics variation?
A. Random pairing of homologous chromosomes
B. Random fertilization
C. Crossing over
D. Independent assortment of chromosomes
QUESTION 10
Generally speaking, how does a proto-oncogene become anoncogene?
A. The proto-oncogene is an inactive precursor protein that iscleaved to form the mature oncogene.
B. The proto-oncogene is phosphorylated, altering the functionto that of an oncogene.
C. Proto-oncogenes can never become oncogenes. These are twocompletely different things.
D. The proto-oncogene is mutated, altering the function to thatof an oncogene.
QUESTION 11
During which process are gametes (sperm and egg) produced?
A. Mitosis
B. Budding
C. Binary Fission
D. Meiosis
