A cell that lacks the ability to make DNA repair enzymes will
A) be unable to replicate its DNA.
B) replicate its DNA as rapidly as a normal cell, but the resulting DNA will have more errors in it.
C) replicate its DNA as well as a cell with intact repair enzymes.
D) be able to correctly replicate its DNA, but it will need more time to do so.
B
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Perchlorate contamination of waterways causes which of the following problems in frogs?
a. male frogs with both male and female sex organs b. excessive growth c. interference with the metabolism of iodine d. low blood calcium and slowed bone formation
Which of the following macromolecules is insoluble in water?
A) lipids B) sugars C) amino acids D) disaccharides E) nucleic acids
Agar, which is used as a thickening agent in the production of ice cream, comes from
A.) red algae B.) dinoflagellates C.) euglenoids D.) fungi
In which organelle of the plant does photosynthesis takes place?
A. thylakoid membrane B. chloroplast C. grana D. mesophyll E. mitochondria