If you were to replace the phosphate group of a phospholipid with a fatty acid chain, you would have
A. a triglyceride.
B. glycerol.
C. cholesterol.
D. glycolipid.
Answer: A
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How do cytotoxic T cells recognize that a transplant is foreign?
A. Presence of different complement factors on the graft B. Presence of different class I MHC molecules on the graft C. Presence of different class II MHC molecules on the graft
Many fern gametophytes are hermaphrodytes, meaning they can produce both sperm and egg. Why is this necessary for a fern, but not for an angiosperm?
a. If a seed colonized a new habitat alone, it could still reproduce b. The gametophyte could produce multiple types of spores c. The gametophyte could produce multiple types of seeds d. If a spore colonized a new habitat alone, it could still reproduce e. Angiosperm gametes are already diploid
Any change in the normal nucleotide sequence that codes for an amino acid is called a ___________________________________.
mutation replication translation transcription protein synthesis
Boiling water before drinking can prevent which types of pathogens from harming the body?
A. Viruses B. Fungi C. Bacteria D. Protists E. All of the answers are correct.