Very Hard Higher Human Biology Quiz

In DNA replication. which enzyme joins fragments together on the lagging strand?

• Ligase

• DNA polymerase

• RNA polymerase

• Amylase

In a DNA molecule of 4000 bases what is the % guanine bases if there are 1200 adenine bases?

• 800

• 30

• 15

• 20

What substance is found at the 3' end of a DNA strand?

• Deoxyribose

• Ribose

• Phosphate

• Base

Which enzyme forms complementary base pairs during DNA replication?

• RNA polymerase

• DNA polymerase

• Ligase

• Amylase

DNA replication can only occur in the 3' to 5' direction.

• True

• False

A DNA nucleotide consists of the following...?

• Deoxyribose sugar, base, phosphate

• Deoxyribose sugar, base, phosphatase

• Ribose sugar, base, phosphate

• Ribose sugar, base, phosphatase

When does DNA replication take place?

• After cell division

• Prior to cell division

When a primer binds to the 3’ end of the template DNA strand it allows DNA polymerase to add DNA

• proteins

• peptides

• nucleotides

• amino acids

What is the short sequence of nucleotides needed by DNA polymerase to start replication called?

• ligase

• primer

• template strand

• fragment

In PCR, what are primers?

• short strands of nucleotides which are complementary to specific target sequences at the two ends of the region of DNA to be amplified.

• long strands of nucleotides which are complementary to specific target sequences at the two ends of the region of DNA to be amplified.

• short strands of nucleotides which are complementary to specific target sequences at one end of the region of DNA to be amplified.