A fourth type of restriction enzyme is identified that cleaves at precise locations like a type II enzyme, but it also occasionally makes mistakes and cuts elsewhere. Would this type of enzyme be a useful enzyme to use in molecular cloning?
A. Yes, because it cuts correctly sometimes.
B. No, because cutting mistakes could lead to incorrect cloning.
C. No, because it is a precise enzyme.
D. Yes, because cutting mistakes don't matter in molecular cloning.
Answer: B
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Regulation of an enzyme's activity occurs
A) transcriptionally. B) translationally. C) posttranslationally. D) at any point on the enzymatic production pathway.
Plasma cells usually live for about one
A) week. B) month. C) year. D) decade.
Answer the following statements true (T) or false (F)
1. A recessive allele is one that is masked if a dominant allele is also present. 2. The most common allele for any trait is always the dominant allele. 3. Genotypes are the outward expression of an allele combination. 4. Mendel's law of segregation states that the two alleles of each gene are packaged into separate gametes. 5. Any dihybrid cross should theoretically yield a 3:1 phenotypic ratio.
Bacteria are helpful to humans in many ways, including all of the following EXCEPT which one?
A) production of antibiotics B) breakdown of raw sewage C) digestion of cellulose in the human intestine D) production of soy sauce E) production of vitamins for the human body