Answer the following statements true (T) or false (F)
1. Translation is a relatively slow process.
2. tRNA contains the genetic code for producing a polypeptide.
3. More than one codon can specify the same amino acid.
4. The termination of translation occurs when a release factor recognizes the stop codon.
1. FALSE
2. FALSE
3. TRUE
4. TRUE
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To attach a particular amino acid to the tRNA molecule that will transport it, an enzyme, an aminoacyl-tRNA synthetase, is required, along with ATP. Initially, the enzyme has an active site for ATP and another for the amino acid
, but it is not able to attach the tRNA. What must occur for the final attachment to occur? A) The ATP must first have to attach to the tRNA. B) The binding of the first two molecules must cause a 3-D change that opens another active site on the enzyme. C) The ATP must be hydrolyzed to allow the amino acid to bind to the synthetase. D) The tRNA molecule must alter its shape to be able to fit into the active site with the other two molecules. E) The end of the tRNA must be cleaved before it can have an attached amino acid.
Ethylene has the effect of causing fruits to
A. enlarge. B. ripen. C. shrink. D. elongate. E. increase in juice content.
Identify the correct steps for cloning a gene of interest, then arrange them in the correct order
1. Transform the bacteria. 2. Incubate the DNA fragments and cut cloning vector with DNA ligase. 3. Use restriction enzymes to cut the gene of interest and the cloning vector. 4. Spread bacteria on medium containing lactose and ampicillin. 5. Spread bacteria on medium containing X-gal and ampicillin.
a. 4, 3, 1, 5 b. 3, 2, 5, 1 c. 3, 2, 1, 5 d. 2, 3, 1, 5 e. 3, 2, 1, 4
Which of the following is NOT true
concerning endometriosis?
a. tissues that line the uterus grow in other places in the pelvis b. oviducts become scarred c. pregnancies are otherwise normal d. intercourse is painful e. all of these are NOT true concerning endometriosis