Which of the following may possess primary, secondary, tertiary, and quaternary structures?
A) Nucleic acids B) Lipids C) Proteins D) Carbohydrates
C
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Penicillin is a competitive inhibitor produced by a fungus in order to kill invading bacteria. It does this by mimicking the substrate required by the bacterium to build and repair its cell wall. Describe how mimicking the substrate would result in the death of the bacterium.
What will be an ideal response?
A line transect would probably be the preferred method to quantify the population density of ______.
A. birds B. lions C. fishes D. trees E. butterflies
Which of the following is a process in translation in which tRNA molecules deliver amino acids in the correct sequence, causing peptide bonds to form and increasing the length of the polypeptide chain?
A) initiation B) elongation C) termination D) transcription
The blood vessels of the umbilical cord are derived from which one of the following structures?
A) allantois B) chorion C) embryonic disk D) amnion E) yolk sac