Chapter 7 Bio continued

When the chromosomes align themselves across the equator of the spindle fibers, it is characteristic of which phase of mitosis?

• Metaphase

• Prophase

• Interphase

• Telophase

During which stage of mitosis do the centrioles move to the opposite poles of the cell?

• Metaphase

• Prophase

• Telophase

• Anaphase

A DNA molecule is characterized by all of the following except:

• Obligatory base pairing

• Phosphate groups

• Ribose sugar

• double helix

A sequence of three bases forms a(n):

• anticodon

• amino acid

• codon

• polypeptide bond

Which of the following statements is true?

a. Amino acid chains form DNA.

b. The site of transcription is within the nucleus, whereas the site of translation is in the cytoplasm.

c. Uracil is present in DNA in place of thymine.

d. None of the above is true.

An individual’s entire set of DNA can be referred to as a:

the sum of all proteins synthesized by all cells in the human body:

Twenty-three chromosomes per cell in humans is referred to as:

DNA replication occurs during:

Which of the following is not a phase of mitosis?

• prophase

• metaphase

• interphase

• telophase