RNA transcription takes place in the
A) mitochondria
B) cytoplasm
C) endoplasmic reticulum
D) nucleus
Ans: D) nucleus
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________ resist tensile forces and contain keratin to form the protective barrier of the skin.
A) Intermediate filaments B) Microtubules C) Microfilaments D) Actin filaments E) Keratin-associated filaments
A zygote is a(n) ____
a. diploid cell b. haploid cell c. gamete d. female gonad e. male gonad
What level of biological classification is less inclusive than class?
a. domain b. phylum c. kingdom d. order e. division
The deamination of cytosine generates a uracil base. This is a naturally occurring nucleic acid base, and so does not represent a DNA lesion caused by damage due to chemicals or irradiation
Why is this base recognized as "foreign" and why is it important for cells to have a mechanism to recognize and remove uracil when it is found in the DNA duplex?