The appearance of gram-negative bacteria after addition of the decolorizing agent in the Gram stain.
a. Purple
b. Red
c. Colorless
d. Brown
Ans: c. Colorless
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Eukaryotic transcription is different than bacterial transcription because eukaryotic transcription ________
A) occurs in the cytoplasm B) does not require general transcription factors to initiate transcription C) only requires one RNA polymerase D) requires the uncoiling of the chromatin fiber E) does not require the mRNA to be modified
Which of the following is a heterotroph?
A) grass B) a tree C) a mushroom D) a geranium E) a cyanobacterium
The time it takes for half of a radioisotope's
atom to decay is called the
a. decay time. b. half-life c. isotopic life d. release time e. denature time
Down syndrome results from the inheritance of
a. only one copy of chromosome 21. b. no copies of chromosome 21. c. an extra copy of chromosome 21. d. two copies of chromosome 21.