In humans, the majority of cells in the body are ______.
a) haploid gametes
b) diploid somatic cells
c) diploid gametes
d) haploid somatic cells
Ans: b) diploid somatic cells
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Which bacteria gram positive or negative have the extra plasma membrane?
a. gram-positive b. gram-negative c. both a. and b. are correct d. none of the above
At the beginning of this century there was a general announcement regarding the sequencing of the human genome and the genomes of many other multicellular eukaryotes. Many people were surprised that the number of protein-coding sequences was much smaller
than they had expected. Which of the following could account for much of the DNA that is not coding for proteins? A) most of the DNA serving as origins of DNA replication B) DNA that consists of histone coding sequences C) DNA that is translated directly without being transcribed D) non-protein-coding DNA that is transcribed into several kinds of small RNAs with biological function E) non-protein-coding DNA that serves as binding sites for reverse transcriptase
Binding of the activating nucleotide di- or triphosphate causes the Ras protein to (first)
a. separate into subunits. b. split the terminal phosphate from the nucleotide-phosphate. c. undergo a conformational change. d. attach a farnesyl tail.
A disease that is usually present at a low level in a certain geographic area is said to be
A. Ubiquitous B. Pandemic C. Epidemic D. Non-communicable E. Endemic