AP Bio Ch. 18 Review

How many types of amino acids are there?A. 15B. 10C. 20D. 25

True or False. Feedback inhibition is typically found in anabolic pathways.

True or False. Feedback inhibition allows a cell to adapt quickly to fluctuations in the availability of important substances.

True or False.If the end product of feedback inhibition accumulates in the cell the whole pathway is shut down.

In bacteria, genes are often clustered into units called what?A. operonsB. bacteriaC. operatorsD. friends

True or False. An operon consists of four parts.

What controls the access of RNA polymerase to genes?A. operonsb. bacteriaC. operatorsD. friends

The promoter is where _________ attaches.A. DNA polymeraseB. RNA polymeraseC. mRNAD. tRNA

The ________ is where RNA polymerase attaches.A. mRNAB. bacteriaC. phageD. operator

True or False.The three parts of the operon are: the operator, promoter, and genes of the operon.

In prokaryotic genomes groups of functionally related genes along with their promoters and operons are found together in ________A. a repressorB. an operonC. a regulatory geneD. an enhancer

A bacterium can make the amino acid glycine or absorb it from its surroundings. A biochemist finds that glycine binds to a repressor protein and causes the repressor to bind to the bacterial chromosome, turning off an operon. If it is like other similar operons, the presence of glycine will result in the _____.A. inhibition of bacterial cell divisionB. breakdown of glycineC. cessation of the synthesis of glycineD. formation of sex pili

In general, operons that encode the enzymes of a biosynthetic (anabolic) pathway (such as the trp operon) are repressible, and those encoding the enzymes of a catabolic pathway (such as the lac operon) are repressible or inducible

In general, operons that encode the enzymes of a biosynthetic (anabolic) pathway (such as the trp operon) are ________, and those encoding the enzymes of a catabolic pathway (such as the lac operon) are inducible repressible or inducible

In an inducible operon, the inducer is often the _____ in the pathway being regulated; the inducer binds to the _____, thus rendering it _____.A. substrateB. repressorC. inactive