APC Question: Figure 1 shows the number of chromosomes observed in an actively dividing human cell at each stage of cell division. Which of the following presents a correct interpretation of the changes in chromosome number depicted in Figure 1?
A.) DNA replication occurs between metaphase and anaphase, doubling the number of chromosomes. Between telophase and cytokinesis, the cell divides in two, with each cell receiving half of the replicated chromosomes.
B.) New
chromosomes formed during prophase are doubled during anaphase and are recombined before cytokinesis.
C.) Chromosomes enter metaphase containing two chromatids attached by a centromere. During anaphase, the chromatids are separated, each becoming a chromosome. Cytokinesis distributes the chromosomes into two separate cells.
D.) At anaphase a cell contains two identical copies of each chromosome, but following telophase, one of the copies is broken down into nucleotides.
Which of the following is the best prediction of how the new disease will affect the two populations?
Which of the following is the best prediction of how the new disease will affect the two populations? (C.) The smaller population will be more affected than will the larger population, because the smaller population has less genetic variation than the larger population has.
Which of the following best predicts how GSK3βGSK3β mutations can lead to the development of cancer?
Which of the following best predicts how GSK3βGSK3β mutations can lead to the development of cancer? Cells with inactive GSK3βGSK3β fail to trigger apoptosis.
Which of the following best describes how the amount of Dnadna in the cell changes during mm phase?
Which of the following best describes how the amount of DNA in the cell changes during M phase? The amount of DNA is halved as the cell divides into two daughter cells.
Which of the following best predicts the effect of inhibiting cyclic AMP?
Which of the following best predicts the effect of inhibiting cyclic AMP phosphodiesterase in a muscle cell stimulated by epinephrine? Phosphorylase kinase will remain active because protein kinase A will no longer be deactivated.