Why do scientists insert their DNA of interest into the middle of the lacZ coding sequence?

a. It makes the bacteria resistant to the antibiotic.
b. It provides a way for researchers to sort the bacteria that have the cloning plasmid from
the bacteria that don't have the cloning plasmid.
c. It aids scientists in developing new antibiotic treatments.
d. It provides a way for sorting bacteria that have the gene of interest from the bacteria that
just have an "empty" cloning plasmid.
e. It makes the bacteria produce more clones.


D

Biology & Microbiology

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Where is the response element found in eukaryotic genes?

A. 10 to 20 base pairs downstream from the transcriptional start site B. 50 to 100 base pairs downstream from the transcriptional start site C. 50 to 100 base pairs upstream from the transcriptional start site D. 10 to 20 base pairs upstream from the TATA box E. 500 to 10,000 base pairs from the enhancer site

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Tubulin is to microtubules as ________ is to microfilaments.

What will be an ideal response?

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Chitin-reinforced bristles that protrude outward from the body wall and are used by most segmented

worms to anchor themselves against a substrate are called

a. metanephridia. b. parapodia. c. septa. d. clitella. e. setae.

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Which of the following structures in the life

cycle of a plant are diploid?

a. spores b. gametophytes c. gametes d. sporophytes e. all of these are diploid

Biology & Microbiology