Many biological molecules are formed by the joining of monomer units in a(n) ________ reaction (removal of water); the reverse process is called ________
Fill in the blank(s) with correct word
dehydration synthesis; hydrolysis
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Why does E. coli shut down the trp operon if tryptophan is available in the environment?
a. Synthesizing an amino acid takes energy so it is a waste of energy to make something that is already available. b. Environmental tryptophan is of higher quality than what the E. coli can make itself. c. The trp operon encodes genes that export tryptophan from the cell; if there is already tryptophan in the environment, further export isn't necessary. d. It doesn't shut down the trp operon but only lowers the level of trp operon activity. e. E. coli actually turns the trp operon on when tryptophan is present; tryptophan is an energy source for the cell, and there is no reason to make enzymes to degrade something that is lacking in the environment.
If R is dominant to r, the offspring of the cross of RR
with rr will a. be homozygous. b. display the same phenotype as the RR parent. c. display the same phenotype as the rr parent. d. have the same genotype as the RR parent. e. have the same genotype as the rr parent.
Burkholderia cepacia and Pseudomonas aeruginosa can be a particular problem with ________.
A. myasthenia gravis patients B. decay of iron pipes under anaerobic conditions C. pneumonia patients D. cystic fibrosis patients
The success rate for a kidney transplant from even a relative is fairly low.
Answer the following statement true (T) or false (F)