Referring to Figure 5-21, which of the following modifications requires ATP?
A. methylation
B. ubiquitination
C. myristoylation
D. acetylation
E. adenylylation
E
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A ________, such as UDPG, is often attached to many sugars during synthesis.
What will be an ideal response?
Fossil evidence shows that giraffes living 1000 years ago had much shorter necks than the giraffes
seen today. Which of the following statements best explains this observation? a. The two groups of giraffes are not related. b. The two groups of giraffes arose as a result of convergent evolution. c. The giraffes acquired longer necks through the continuing process of natural selection. d. The difference in neck length supports Lamarck's hypothesis. e. The difference in neck length is evidence for homoplastic inheritance
An illegal practice is found among some athletes who try to increase the normal number of RBCs in an attempt to boost oxygen delivery. This practice is called ________
A) blood doping B) leukemia C) bloodletting D) bone marrow transplant
If the first living things were autotrophs, they
A. would have used organic molecules as a source of energy. B. would have engaged in photosynthesis. C. would have engaged in chemosynthesis. D. All of these answers are true.