After conjugation between an F+ cell and an F- cell, is the F- cell F- or F+? After conjugation between
an Hfr cell and an F- cell, is the F- cell F- or F+? Explain each answer.
What will be an ideal response?
After conjugation between F+ and F- cells, the F- cell becomes F+ because the F factor is completely
transferred from the F+ cell to the F- cell. After conjugation between Hfr and F- cells, the F factor is
not completely transferred, and therefore the F- cell remains F-.
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How does the metabolism occurring in chloroplasts differ from that of mitochondria?
A. Different proton sources B. Different electron sources C. Different electron acceptors D. Different electron acceptors and sources E. None of these answer options is correct.
Which of the following invertebrates has an
endoskeleton?
a. clams b. lobsters c. sea stars d. earthworms e. more than one of these invertebrates has an endoskeleton
What is meant by the "directionality" of the strands of a DNA molecule? Explain how this directionality is ultimately responsible for Okazaki fragments. What will be an ideal response?
The vertebrates that lack jaws are called
A. turtles. B. lampreys. C. rays. D. eels.