"P" is the elemental symbol for
A. nickel.
B. potassium.
C. plutonium.
D. phosphorus.
E. copper.
D. phosphorus.
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What are plasmids?
a. They are circular strands of DNA found in bacteria. b. They are vectors of diseases. c. They are a type of virus. d. They are genetic clones of bacterial chromosomes.
The reduction of the microbial population to levels that are considered safe by public health standards is called ________.
A. disinfection B. antisepsis C. sterilization D. sanitization
Which statement about selective gene transcription in eukaryotes is not true?
a. Transcription factors can bind at a site on DNA distant from the promoter. b. Transcription requires transcription factors. c. Genes are usually transcribed as groups called operons. d. Both positive and negative regulation occur. e. Many proteins bind at the promoter.
Explain why insertions and deletions are called frameshift mutations, using the terms reading frame, codons, and amino acids in your answer.