Organisms that grow at 0°C and have a maximum growth temperature of 35°C are called ________.
A. frigiphiles
B. mesophiles
C. psychrophiles
D. psychrotrophs
Answer: D
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Karyotype analyses are performed on cells in ____ of mitosis
a. prophase b. prometaphase c. metaphase d. anaphase e. telophase
Spongiform encephalopathy describes all of the following diseases except:
A) Alzheimer's disease B) Mad Cow disease C) Kuru D) Elk wasting disease E) Creutzfeld - Jakob disease
A recessive allele is one
A) that produces no effect when present in the homozygous condition. B) that is not expressed as strongly as a dominant allele. C) that must be lethal in the homozygous condition. D) whose effect is masked when paired with a dominant allele. E) that appears only in a heterozygote.
What would a scientist need to use in the CRISPR-Cas system to introduce a small deletion into a gene?
A. CRISPR gene B. sgRNA C. Cas2 gene D. donor DNA E. Cas9 gene