For each of the following sentences, fill in the blanks with the best word or phrase in the list below. Not all words or phrases will be used; use each word or phrase only once
Most variation between individual humans is in the form of __________________. __________________ may arise by recombination within introns and can create proteins with novel combinations of domains. Scientists and government regulators must be very careful when introducing herbicide-resistant transgenic corn plants into the environment, because if resistant weeds arise from __________________ then the herbicides could become useless. Families of related genes can arise from a single ancestral copy by __________________ and subsequent __________________.
divergence purifying selection
exon shuffling single-nucleotide polymorphisms
gene duplication synteny
horizontal gene transfer unequal crossing-over
Fill in the blank(s) with correct word
Most variation between individual humans is in the form of single-nucleotide polymorphisms. Exon shuffling may arise by recombination within introns and can create proteins with novel combinations of domains. Scientists and government regulators must be very careful when introducing herbicide-resistant transgenic corn plants into the environment, because if resistant weeds arise from horizontal gene transfer then the herbicides could become useless. Families of related genes can arise from a single ancestral copy by gene duplication and subsequent divergence.
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DNase is used to treat hemophilia
Indicate whether the statement is true or false
A new DNA strand elongates only in the 5' to 3' direction because
A) DNA polymerase begins adding nucleotides at the 5' end of the template. B) Okazaki fragments prevent elongation in the 3' to 5' direction. C) the polarity of the DNA molecule prevents addition of nucleotides at the 3' end. D) replication must progress toward the replication fork. E) DNA polymerase can only add nucleotides to the free 3' end.
What term is used to describe a disease that develops slowly and is likely to continue or recur for long periods?
A) acute B) chronic C) latent D) subacute
The methylene blue reductase test is based on the assumption that milk with a high bacterial load will have an excess of free oxygen available due to its metabolism by the bacteria.
A) True B) False