Which enzyme seals together new nucleotides attached to a parent strand of DNA?

A) DNA polymerases
B) DNA ligases
C) hydrogenases
D) helicases


Answer: B) DNA ligases

Biology & Microbiology

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You find a protist that is unicellular, heterotrophic, and non-flagellated. It has two nuclei of different sizes. You

correctly conclude that this organism is a(n) ____.

a. kinetoplastid b. plasmodial slime mold c. ciliate d. foram e. amoebozoan

Biology & Microbiology

A(n) ____ is an observed consequence of global climate change

a. more earthquakes b. acid rain c. increase in the ozone hole d. decrease in the ozone layer e. rise in sea level

Biology & Microbiology

FGA is one of the STRs that are used to compare DNA between different people. Why is FGA useful for comparing DNA between different people?

A) FGA varies in the number of repeats between different people. B) FGA varies in sequence between different people. C) FGA is only present in some peoples' genomes. D) FGA is present in different places in different peoples' genomes.

Biology & Microbiology

Household ammonia, or ammonium hydroxide, is a mixture of ammonia (NH3 ) and water. What types of bonding interactions will occur between molecules of ammonia and water in a bottle of household ammonia?

A) polar covalent bonds between positively charged nitrogen atoms in ammonia and negatively charged oxygen atoms in water B) polar covalent bonds between negatively charged nitrogen atoms in ammonia and positively charged hydrogen atoms in water C) hydrogen bonds between positively charged nitrogen atoms in ammonia and negatively charged oxygen atoms in water D) hydrogen bonds between negatively charged nitrogen atoms in ammonia and positively charged hydrogen atoms in water

Biology & Microbiology