Which of the following statements about the polymerization of macromolecules is false?
A) Often the energy needed for polymerization is supplied by ATP.
B) The polymer chain usually has two different ends.
C) Water is added to join the monomers of the macromolecules.
D) A monomer is usually activated by the coupling of the monomer to a carrier.
E) Macromolecules are synthesized by the stepwise addition of monomers.
Answer: C
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A proficient engineer can easily design skeletal structures that are more functional than those currently found in the forelimbs of such diverse mammals as horses, whales, and bats. The actual forelimbs of these mammals do not seem to be optimally arrange
d because _____. A) natural selection has not had sufficient time to create the optimal design in each case, but will do so given enough time B) in many cases, phenotype is determined by genotype and the environment C) though we may not consider the fit between the current skeletal arrangements and their functions excellent, we should not doubt that natural selection ultimately produces the best design D) natural selection is generally limited to modifying structures that were present in previous generations and in previous species
Identify the stage of mitosis shown in panel C
a. interphase b. prophase c. metaphase d. anaphase e. telophase
What kind of fruit is formed from fused
ovaries of several associated flowers?
a. aggregate b. simple c. multiple d. accessory e. berries
Most of the oxygen in human blood is:
A) carried in the plasma membrane of red blood cells. B) dissolved in the plasma. C) carried in hemoglobin. D) carried on albumin.