Feedback inhibition of the first enzyme of a pathway by the end product of the pathway is an exampleof:a
translational control.
b. posttranslational control.
c. transcriptional control.
d. inhibiting control.
e. repression.
B
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Matsumara et al. showed that disulfide bonds create a more stable mutant T4 lysozyme. They inserted pairs of Cys residues into the T4 lysozyme sequence and observed that:
A. the reduction of cysteine residues created a protein that denatured at lower temperatures than wild-type lysozyme. B. the reduction of cysteine residues created a protein that was stable at higher temperatures than wild-type lysozyme. C. the oxidation of cysteine residues created a protein that denatured at lower temperatures than wild-type lysozyme. D. the oxidation of cysteine residues created a protein that was stable at higher temperatures than wild-type lysozyme. E. None of these choices is correct.
Growth in ocean areas that are high nutrient and low chlorophyll (HNLC) is limited by the availability of ________.
A. iron B. manganese C. phosphorus D. nitrogen
The kneecap is the:
a. hyoid b. patella c. scapula d. clavicle e. phalanx
The species extinctions taking place today are being caused by ____ activities
a. human b. volcanic c. plate tectonic d. extraterrestrial e. geothermal