Which of the following is a form of active transport?
a. osmosis
b. facilitated diffusion
c. simple diffusion
d. exocytosis
e. glucose transport
ANSWER: d
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Understanding the role of telomerase has helped scientists understand the number of times a cell can divided. If scientists could control the telomerase activity in specific cells, they could potentially stop
A. the formation of cancer. B. aging of cells. C. All of the answer choices are correct. D. meiosis. E. aerobic respiration.
Imagine that you are an archaeologist on a dig somewhere on an East Asian island and than you begin to excavate an area littered with stone tools that also has the remains of an ancient fire
Subsequent carbon dating of the charcoal from the fire yields a date of 100,000 years before the present. Given these circumstances, which species would you expect most likely set that fire? A) Australopithecus afarensis B) Homo erectus C) Homo ergaster D) Ardipithecus ramidus
Which of the following statements accurately describes prophase?
a. The cell appears to have a line of chromosomes across the midregion. b. The nuclear envelope becomes visible. c. The cell constructs microtubules to form a spindle. d. Chromatids separate and become known as chromosomes.
Sickle-cell anemia is caused by a recessive mutation in the hemoglobin gene. However, heterozygote individuals also show a small percentage of sickled red blood cells. What type of inheritance pattern is this an example of?
A) Polygenic inheritance B) Sex linked C) Chromosomal nondisjunction D) Incomplete dominance