In replication, once the DNA strands have been separated, reformation of the double helix is preventedby:a

DNA helicase enzyme.
b. single-strand binding proteins.
c. DNA polymerases.
d. ATP.
e. GTP.


B

Biology & Microbiology

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What would result from a single nucleotide deletion (point mutation) within the coding sequence of a structural gene?

A. a silent point mutation with no deleterious effects B. a missense point mutation resulting in the change of one amino acid C. a nonsense point mutation resulting in the generation of a premature stop codon D. a frameshift mutation, producing a different amino acid sequence altogether E. All of the choices are possible.

Biology & Microbiology

The inner membrane system of chloroplasts consists of flattened sacs called ________ that form stacks called ________.

Fill in the blank(s) with the appropriate word(s).

Biology & Microbiology

The following amino acid would be characterized as ____ based on the chemical properties of its side chain


a. basic
b. acidic
c. nonpolar
d. hydrophilic
e. electrically charged

Biology & Microbiology

Sperm and egg cells contain half the number of chromosomes found in somatic cells, and are referred to as ________, which comes from the Greek word haploos, meaning "single."

Fill in the blank(s) with correct word

Biology & Microbiology