How do we know that viral and bacterial chromosomes most often consist of circular DNA molecules devoid of protein?
A. Higher level circular chromosomal structures have been revealed through electrophoresis and density analysis.
B. Higher level circular chromosomal structures have been revealed through both mathematical calculations and electron microscopy
C. Higher-level circular chromosomal structures have been revealed through both chemical and observational (microscopic) analyses
D. Higher-level circular chromosomal structures have been revealed through both chemical and radiolabeling analyses.
Answer: C. Higher-level circular chromosomal structures have been revealed through both chemical and observational (microscopic) analyses
You might also like to view...
You are working on a research project that involves a mutational analysis of the light harvesting complex Lhca1, which is an important light harvesting complex found in plants. Your labmate asks where this complex is located. You say it is in the.
A. outer chloroplast membrane B. inner chloroplast membrane C. thylakoid membrane D. stroma E. matrix Clarify Question What is the key concept addressed by the question? What type of thinking is required? Gather Content What do you already know about how light harvesting occurs in photo systems during photosynthesis? What other information is related to the question? Choose Answer Do you have all the information needed to provide an explanation? Reflect on Process Did your problem-solving process lead you to the correct answer? If not, where did the process break down or lead you astray? How can you revise your approach to produce a more desirable result?
Two host races of apple maggots have appeared within the past 100 years. This suggests that they may
be undergoing
a. parapatric speciation. b. allopatric speciation. c. sympatric speciation. d. genetic drift. e. development of a hybrid zone.
Vertebrates that practice internal fertilization employ three strategies for embryonic and fetal development. In one strategy, the female retains the young which develop and obtain nourishment from the female's blood. What is this called?
A. oviparity B. ovoviviparity C. viviparity D. protogyny E. protandry
What is the function of inhibin?
a. To inhibit sperm production b. To concentrate testosterone in the testes c. To inhibit FSH secretion d. To stimulate FSH secretion e. To stimulate the interstitial cells to produce testosterone