The basic building block of DNA and RNA is a(n) ____
a. nitrogenous base
b. sugar-phosphate backbone
c. amino acid
d. nucleotide
e. ribose sug
d
Biology & Microbiology
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A Barr body is a(n) ____
a. activated X chromosome b. inactivated X chromosome c. immature trophoblast d. immature blastocyst e. mature blastocyst
Biology & Microbiology
What type of enzyme fills in the gap after damaged DNA has been removed?
A. primase B. polymerase C. helicase D. ligase E. nuclease
Biology & Microbiology
Your body produces all the following digestive enzymes, but not all of them are produced where they are used. Which of the following is produced at a different location from where it is used?
A) lactase B) salivary amylase C) pepsin D) sucrase
Biology & Microbiology
Pathogens in droplets of body fluids are spread by (contact/indirect/vehicle) transmission
What will be an ideal response?
Biology & Microbiology