A new plant species formed from the hybridization between a plant with a diploid number of 16 and a plant with a diploid number of 12 would probably have a gamete chromosome number of
A) 12.
B) 14.
C) 16.
D) 22.
E) 28.
Answer: B) 14.
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The major difference in gene regulation between prokaryotes and eukaryotes is that...
A. eukaryotic and prokaryotic genes are usually grouped for common functions. B. eukaryotic genes regulation requires fewer signals that prokaryotic gene regulation. C. eukaryotic gene regulation is more simplistic than prokaryotic gene regulation. D. eukaryotic genes are arranged individually, while prokaryotic genes are grouped into operons. E. eukaryotic gene regulation tends to require less coordination and integration than prokaryotic gene regulation.
Adenoviruses are a frequent cause of acute upper respiratory tract infections in humans. Adenoviruses have a genome composed of double-stranded DNA; they are non-enveloped and their capsid contains a "fiber" protein that is analogous in function to the spike glycoproteins of HIV. Latency of the adenovirus can occur in lymphoid tissues. Based on this information, which of the following would be the best type of drug to develop to combat adenoviruses in humans?
A. a drug that inhibits reverse transcriptase B. a drug that binds to fiber protein receptors in human cells C. a drug that can switch off latency D. a combination of drugs that inhibit reverse transcriptase and that binds to fiber protein receptors in human cells E. a combination of drugs that inhibit reverse transcriptase, binds to fiber protein receptors in human cells, and switches off latency
In humans, the blastocyst develops about ____ days after fertilization
a. 1 b. 3 c. 5 d. 7 e. 9
Answer the following questions true (T) or false (F)
1. The Simmons citrate test and triple sugar iron (TSI) media are common examples of slants. 2. The pour plate method is capable of detecting an exact cell number in the plated sample. 3. Disinfectants are applied to living tissue such as skin.