The following drawing represents simultaneous transcription and translation in E. coli
Answer the questions below the drawing. The arrow gives the direction of the RNA polymerase.
(a) Is the letter A nearer the 5' or the 3' end of the molecule?
(b) Is the letter B nearer the 5' or the 3' end of the molecule?
(c) Is the letter C nearer the 5' or the 3' end of the tRNA molecule?
(d) What is the "S" value for the large rRNA that is closest to the letter D?
(e) Which terminus (N or C) of the growing polypeptide chain is nearer to the letter E?
(a) 3', (b) 5', (c) 3', (d) 23S, (e) N
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Matching I. Choose the one most appropriate
statement for each. 1. ___ bile salts 2. ___ bolus 3. ___ cholecystokinin 4. ___ chyme 5. ___ mucosa 6. ___ ruminants 7. ___ secretin 8. ___ segmentation 9. ___ serosa A. a process that mixes the contents of the lumen and forces it against the absorptive surface of the gut B. stimulates pancreatic bicarbonate secretion C. thin, outermost layer of gastrointestinal tract D. a softened ball of food particles E. emulsify fat globules F. have multiple stomach chambers, some of which store populations of microorganisms G. innermost layer of the gut; contains diverse secretory cells H. stimulates gallbladder and stomach emptying as well as pancreatic enzyme secretions I. a mixture of food particles in the stomach
The part of the plant that is a waxy coating that minimizes water loss from leaves is the:
a. Stomata b. Root c. Xylem d. Phloem e. Cuticle
cDNA libraries contain:a
single stranded DNA. b. DNA synthesized with the use of DNA polymerase. c. DNA synthesized from and complementary to an mRNA template.
d. introns and exons. e. genomic DNA
If genetic tests showed that a tomato plant had viral DNA integrated into its chromosomes without outward symptoms caused by the virus, you could say that the tomato plant had
A) a rare form of viral infection. B) a transgenic infection. C) a lytic infection. D) a systematic infection. E) a lysogenic infection.