Which of the following best describes the translational elongation process?
A. tRNA molecules condense with rRNA molecules.
B. Ribonucleotides are added to amino acids through the synthesis of phosphodiester bonds.
C. The polypeptide chain is lengthened by synthesizing peptide bonds between amino acids.
D. Ribosomal proteins aggregate to form polysomes.
C
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If all three enzymes catalyze the same reaction and your conditions require a pH of 7, the best enzyme
to use would be:
a. enzyme 1. b. enzyme 2. c. enzyme 3. d. either enzyme 2 or 3. e. both enzymes 2 and 3.
To begin transcription the RNA polymerase recognizes a specific DNA sequence called the
1.promoter. 2.terminator. 3.codon. 4.origin of replication. 5.All of the choices are correct.
Cryptosporidium is an apicomplexian that can contaminate water supplies. Which of the following would you predict to be the case of a Cryptosporidium outbreak?
a. It can only be transmitted by insect bites because it is nonmotile b. It can grow in any water supply because it is photosynthetic c. It will be difficult to treat with chlorine because it forms spores d. It spreads rapidly because it has flagella e. It will enter a person's body through their respiratory tract
Which one of the following is considered an accessory digestive organ?
A) pancreas B) stomach C) small intestine D) esophagus E) large intestine