Why is it necessary for DNA to duplicate before cells divide
Answer: To give a complete set of generic material to each daughter cell.
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Complement proteins can form a system of proteins that create a pore in the membranes of bacteria. This system is called the ____________________
Fill in the blank(s) with correct word
Which of the following is not a characteristic of normal cells?
A. They grow as a monolayer. B. They grow as multiple layers. C. They undergo a limited number of divisions and then die. D. They stick tightly to the surface of glass culture dishes.
The radioactive decay of 14C produces
a. carbon 12. b. carbon 13. c. more carbon 14. d. nitrogen 14. e. oxygen 14.
DNA polymerase
a. is an enzyme. b. adds new sugars to a strand. c. proofreads RNA strands to see that they are correct. d. unwinds the DNA molecule during repair. e. is made of uracil.