states Page 61that all organisms are composed of cells, the smallest units of living matter and that new cells come only from preexisting cells.
What will be an ideal response?
Cell theory
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Imagine that a cell has a genetic mutation so that the primase enzyme is unable to make RNA strands
Assuming that all of the other enzymes directly involved in DNA replication are still functional in these cells, how much of the process of DNA replication would you expect to see in these cells?
a. The leading strand would be synthesized, but not the lagging strand. b. None of it at all, no part of the DNA replication process could occur. c. The DNA helix would be unwound by helicase, but no new strands will be produced at all. d. Both the leading and lagging strand would be synthesized, but pieces of discontinuous strands would not be joined together. e. DNA replication would still proceed completely, since RNA strands are not part of the final product of DNA replication.
Why are ferns considered incompletely adapted to the terrestrial environment, when compared with other plants?
A) They lack vascular tissue. B) Their sperm are flagellated. C) The gametophyte generation is dominant. D) They lack cuticle.
Which of the following is true of cellulose?
A) Animals store glucose as cellulose. B) Plants store glucose as cellulose. C) Plants' cell walls are made up of cellulose. D) Plants store amino acids as cellulose.
Although there are many distinct prokaryotic species, most have a small range of shapes, sizes, and growth rates. Which of the following characteristics are not observed in prokaryotes?
(a) a highly structured cytoplasm (b) endoplasmic reticulum (c) the ability to divide rapidly (d) a cell wall