Refer to the accompanying figure. The area of the tryptophan operon labeled as 3 is the:



a. promoter.

b. repressor gene.

c. ribosome.

d. RNA polymerase.

e. operator.


e

Biology & Microbiology

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Knight followed up on attempts of English farmers to improve varieties of agriculture with his studies on garden peas. When he crossed two true-breeding varieties, he found all of the following: Check all that apply. 

_____ All the F1 offspring had the dominant trait. _____ If both parents have the same trait, then all of their offspring will also have that trait. _____ Some F2 offspring had the dominant trait and some had the recessive trait. _____ Among the F2 offspring, more had the dominant trait and fewer had the recessive trait.

Biology & Microbiology

Magnification is achieved in a compound microscope through the initial magnification of the specimen by the ________ lens. This image is then projected to the ________ lens that will further magnify the specimen to form a virtual image received by the eye.

A. ocular; objective B. objective; ocular C. scanning; objective D. ocular; oil immersion

Biology & Microbiology

DNA replication is a ____ process

a. noncomplementary b. semiconservative c. semisynthetic d. mutational e. denaturation

Biology & Microbiology

The membranous labyrinth of the inner ear consists of the:a

saccule, utricle, and three semicircular canals.

b. vestibular canal and oval window. c. cochlea, tympanum, and three bones. d. statoliths and hair cells. e. endolymph, perilymph, and the organ of Corti.

Biology & Microbiology