The main problem for those with cystic fibrosis involves ____
a. mucus sticking to dry surfaces
b. jerky muscle contractions
c. constant thirst
d. salt accumulations between tissues
e. low pH in tissues preventing proper enzymatic activity
ANSWER: a
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In almost all organisms that have been studied, the genes in Hox clusters:
A. are arranged on chromosomes in the same order as their products function along the anterior-posterior segments of the embryo. B. are expressed in a sequence that is independent of their linear organization along the chromosome. C. each contain a unique homeodomain, the the products of which are very different among organisms. D. are arranged on the chromosomes in a sequence that is independent of the order in which their products function along the anterior-posterior axis of the embryo. E. None of these choices are correct.
What gene(s) is/are encoded in the Xic?
A. Xce B. Xist C. Tsix D. Both the Tsix and Xist genes are in the Xic region
The ____ contains the greatest volume of ocean water
a. oceanic province b. intertidal zone c. euphotic zone d. neritic province e. limnetic zone
The sugar in DNA is deoxyribose while the sugar in RNA is ribose.
Answer the following statement true (T) or false (F)