More than half of our antibiotics are
A) produced by fungi.
B) produced by bacteria.
C) synthesized in laboratories.
D) produced by Fleming.
E) produced by eukaryotic organisms.
B
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Males with one copy of an X-linked gene are said to be ________ for that gene.
A) homozygous B) heteroallelic C) heterozygous D) hemizygous E) deficient
Which statement is true of DNA’s structure?
a. The hydrogen bonding of cytosine to guanine is an example of complementary base pairing. b. In DNA, adenine always base pairs with guanine and cytosine always base pairs with thymine. c. Each of the four nucleotides in a DNA molecule has the same nitrogen-containing base. d. When adenine base pairs with thymine, they are linked by three hydrogen bonds. e. All four bases in DNA can be found in equal quantities.
A string of 30 to 100 adenine nucleotides
A. is found in the promoter region of all genes. B. is the sequence of which introns are composed. C. is found at the 3'-end of all tRNAs. D. is found in the terminator region of all genes. E. is added to the 3'-end on mRNA during RNA processing.
Lipid A causes disseminated intravenous coagulation (DIC).
Answer the following statement true (T) or false (F)