How many ejaculated sperm will reach the upper portions of the oviduct?
a. 10-20
b. 100-200
c. 1,000-2,000
d. 10,000-20,000
e. 100,000-200,000
ANSWER: b
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Why is the formation of a BCR-ABL fusion gene a carcinogenic event?
A. The tyrosine kinase activity of the ABL gene becomes inactive. B. The tyrosine kinase activity of the ABL gene is now controlled by a weak promoter resulting in less tyrosine kinase activity. C. The tyrosine kinase activity of the ABL gene becomes unregulated leading to uncontrollable cell division. D. The tyrosine kinase activity of the ABL gene is reduced due to truncation of the protein product. E. The tyrosine kinase activity of the BCR gene is increased in the fusion protein product.
The compound that Dr. Folling isolated from the urine of the Egeland children was ____________
A. phenylalanine D. phtalamine B. pyruvic acid E. pertussic acid C. phenylpyruvic acid
Upon fertilization, the egg and sperm fuse to form a single cell called a(n) ________
A) zygote B) gamete C) embryo D) gonad
A solid waste (garbage) transfer facility that sorts and breaks down garbage into recyclables and waste to be thrown away in the landfill would be a suitable analogy for which cellular organelle?
a. smooth ER b. rough ER c. lysosome d. nucleus