Which of the following are ways that usable
nitrogen is removed from the soil?
a. nitrification
b. leaching c. nitrogen fixation
d. ammonification
e. all of these
Answer: e
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A deuterostome is distinguished by a(n):
A. endoderm that becomes a mouth. B. mesoderm that becomes an anus. C. blastopore that becomes a mouth. D. blastopore that becomes an anus.
Which of the following alternate forms of nucleic acids are not known to be biologically important?
A. G tetraplex structures can form and act as recognition sites for enzymes that cleave DNA. B. Inverted repeats can form hairpins that are important for slowing or preventing protein synthesis. C. Palindromic sequences can act as recognition sites for enzymes that cleave DNA. D. Sequence-induced bending of the DNA can act as a binding site for transcription factors. E. Cruciform structures are formed during recombination.
If a testcross for two different traits produces more nonrecombinant than recombinant offspring, then the alleles for the two traits
A. are dominant. B. are on the same chromosome. C. are on different chromosomes. D. are epistatic. E. are both dominant and on the same chromosome.
Which vector would be best to use if you want to construct a genomic library with the largest fragments possible?
A) YAC B) BAC C) Plasmid D) Virus