During which phase of mitosis do the chromatids become chromosomes?
A) telophase
B) anaphase
C) prophase
D) metaphase
B
You might also like to view...
How many molecules of ATP are needed to reduce one molecule of carbon dioxide to carbohydrate by oxygenic phototrophs during the dark reactions of photosynthesis?
A. 10-12 B. 2 C. 4 D. 3
Transformation in a cloning experiment is ________
A) ligating pieces of foreign DNA together B) inserting DNA into bacteria cells C) cutting DNA with restriction enzymes D) using PCR to clone a gene E) a technique for determining gene copy number in a genome
Evolutionary trees are constructed using all of the following except:
A. similarities in the physical structure of organisms. B. similarities in the embryological development of organisms. C. similarities in the DNA sequences of organisms. D. tissue samples.
Extremophilic bacteria are able to survive in hostile environments, including scalding hot water as well as springs and vents that reach temperatures over 100°C
Researchers studying these bacteria measured the function of a protein from an extremophile bacterium at 100°C, and they also measured the function of a similar protein from a human cell at 100°C. Which of the following results do you think the researchers obtained? A) The bacterial protein functioned normally, whereas the human protein did not. B) The human protein functioned normally, whereas the bacterial protein did not. C) The bacterial protein and the human protein both functioned normally. D) Neither the human protein nor the bacterial protein functioned normally.