Which cell type is responsible for a major component of tissue rejection following an organ transplant?
a. B cells
b. plasma cells
c. memory cells
d. T helper cells
e. cytotoxic T cells
ANSWER: e
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The lagging strand is the daughter strand that has its ____ end pointed toward the replication fork and is therefore synthesized ______
A. 3'; in a series of segments B. 3'; continuously C. 5'; in a series of segments D. 5'; continuously E. None of the answer options are correct.
Mifepristone, also known as RU-486, is used in combination with ____ to terminate an unwanted pregnancy
a. copper b. cyclooxygenase c. estrogen d. progesterone e. a prostaglandin
The following items are organelles found in animal cells
Respond to statements 100–108 with reference to these organelles. a. ribosome b. mitochondrion c. lysosome d. Golgi body e. endoplasmic reticulum E 100. This organelle is the site of polypeptide assembly. M 101. The cellular digestion and disposal of biological molecules occurs inside this organelle. M 102. Aerobic respiration occurs in this organelle. M 103. RNA carries out the genetic code translation process in association with ribosomes on this organelle. Chapter 4 Cell Structure and Function 11 M 104. The packaging of secretory proteins occurs in association with this structure. M 105. This organelle is involved in lipid production and protein transport. E 106. Proteins are synthesized on this tiny, two-part organelle. E 107. Sugar metabolism occurs in association with this organelle. D 108. DNA synthesis occurs in the nucleus. Its breakdown can occur in this organelle.
Which gene therapy is currently approved in the United States?
A) stem cell gene therapy B) enhancement gene therapy C) somatic gene therapy D) germ-line gene therapy