Figure 28.2
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The following question refers to the accompanying figure illustrating soil horizons.
Which soil horizon is composed of organic litter?
A. O Horizon
B. A Horizon
C. B Horizon
D. C Horizon
E. Bedrock
Answer: A
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The site of translation in all living cells is the ribosome, which is
a. made of large and small subunits in both prokaryotes and eukaryotes. b. made of large and small subunits in eukaryotes, but is a single unit in prokaryotes. c. a single unit in both prokaryotes and eukaryotes. d. made of large and small subunits in prokaryotes but is a single unit in eukaryotes. e. larger in prokaryotes than eukaryotes
Which RNA molecule carries the sequence of nucleotides that determines the order of amino acids in a protein?
A) transfer RNA B) ribosomal RNA C) messenger RNA D) translator RNA
Which of the following proteins are part of the first line of defense against microbial invasion?
A) dermcidins B) TLRs C) NOD proteins D) C3 and C5 E) interferons
Which of the following arrangements is sometimes referred to as having a beads-on-a-string appearance?
A) streptococci B) staphylococci C) streptobacilli D) diplococci E) palisade