Unit 6 Review Academic Biology

Which of the following is NOT part of a nucleotide

• sugar

• phosphate

• nitrogen base

• amino acid

Adenine pairs with

• Thymine

• Thyme

• Guanine

• Glutamine

The backbone of DNA is made of

• base pairs

• sugars and phosphates

• only sugars

• only phosphates

The two strands of DNA are held together with

• covalent bonds

• hydrogen bonds

• nothing

If a DNA molecule has 30% Guanine bases, how many Cytosine bases will it have?

• 30%

• 25%

• 20%

• 10%

The first step in DNA replication is

• to unwind and unzip the two strands

• to break the backbone in half so the sequence can be copies

• to attach new nucleotides

• to proof read the sequence

What does semiconservative replication mean?

• that the DNA is proof read at the end of the process

• that the newly made DNA has one strand from the original DNA and one new strand

• that the newly made DNA will send half of its strand to one cell and leave the old strand in the original cell

• that the original DNA strands come back together after replication is over

What is the name of this?

• DNA

• deoxyribose sugar

• nucleotide

• nitrogenous base

The DNA sequence is TTA CCG What is the complementary sequence?

• TTA CCG

• AAT GGC

• GGC AAT

In eukaryotes, which organelle is DNA usually found in?

• cell membrane

• vacuole

• chloroplast

• nucleus