Which of the following clusters of terms accurately describes DNA as it is generally viewed to exist in prokaryotes and eukaryotes?
A) double-stranded, parallel, (A + T)/(C + G) = variable, (A + G)/(C + T) = 1.0
B) double-stranded, parallel, (A + T)/(C + G) = 1.0, (A + G)/(C + T) = 1.0
C) double-stranded, antiparallel, (A + T)/(C + G) = variable, (A + G)/(C + T) = variable
D) double-stranded, antiparallel, (A + T)/(C + G) = variable, (A + G)/(C+ T) = 1.0
E) single-stranded, antiparallel, (A + T)/(C + G) = 1.0, (A + G)/(C + T) = 1.0
D
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In mammals, Hox genes:
A. specify limbs and other structures associated with each body segment. B. direct development of structures that become parts of the hindbrain, spinal cord, and vertebral column. C. evolved by partial-genome duplication from the ancestral genes. D. are expressed in a sequence that does not reflect their linear order on the chromosome or the regions they affect. E. All of these choices are correct.
Which of the following statements about medical asepsis is false?
A) Disinfection is a medical aseptic technique. B) Handwashing is a medical aseptic technique. C) Medical asepsis is considered a clean technique. D) The goal of medical asepsis is to exclude all microorganisms from an area.
Assume that one counted 67 plaques on a bacterial plate where 0.1 ml of a 10-5 dilution of phage was added to bacterial culture. What is the initial concentration of the undiluted phage?
What will be an ideal response?
What is another name for "reducing sugars?"
What will be an ideal response?