The polymerase chain reaction (PCR) uses ________, nucleotides, and a heat-resistant DNA polymerase to rapidly
increase the number of molecules of a DNA fragment. Fill in the blank(s) with the appropriate word(s).
ANSWER: primers
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Where are sperm formed?
A. epididymis B. seminal vesicle C. testis D. vas deferens E. prostate gland
Which organelle contains powerful enzymes for digesting cellular waste?
a. Golgi body b. ribosome c. mitochondrion d. lysosome e. peroxisome
As the result of exposure to a mutagen, cytosine is substituted for thymine in one strand of DNA. Upon subsequent DNA replication, one of the daughter cells will have a GC pair in this position instead of an AT pair. This is called a(n) ________ mutation.
A. transversion B. frameshift C. insertion D. transition
The thermoacidophile Sulfolobus acidocaldarius lacks peptidoglycan, but still possesses a cell wall. What is likely to be true of this species?
1. It is a bacterium. 2. It is an archaean. 3. The optimal pH of its enzymes will lie above pH 7. 4. The optimal pH of its enzymes will lie below pH 7. 5. It could inhabit certain hydrothermal springs. 6. It could inhabit alkaline hot springs. A) 1, 3, and 6 B) 2, 4, and 5 C) 1, 3, and 5 D) 1, 4, and 5