Predict what might happen to telomeres in Tetrahymena cells if the Tetrahymena template RNA were mutated from 3'-ACCCCAAC-5' to 3'-AGCCCAAC-5'.
A. Telomere sequence would be altered to 5'-CTTGGG-3'.
B. There would be no changes in telomeres compared to normal cells.
C. Telomere sequence would be altered to 5'-GGGTTC-3'.
D. Telomeres would become shorter in every generation compared to normal cells.
Ans: D. Telomeres would become shorter in every generation compared to normal cells.
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Restriction enzymes:
A. are found in a wide variety of mammalian cell types. B. cleave invading bacterial DNA. C. always produce sticky ends. D. typically cleave at palindromic sequences 4–8 base pairs long. E. are necessary for joining two DNA fragments together.
When a sea star loses a leg and the leg grows into an adult sea star, this is an example of which of the following?
a. parthenogenesis b. hermaphroditic mating c. fragmentation d. budding
Is made up of collagen and calcium-binding proteins, collagen makes up 90% of bone protein. Makes up one third of organic bone matrix, is secreted by osteoblasts. Consists of ground substance and collage fibers, which contribute to high tensile strength and flexibility of bone.
What will be an ideal response?
A phosphate group binds to what molecule to create the "backbone" of the DNA molecule?
A) Adenine B) Deoxyribose C) Ribose D) Other phosphate molecules