Quiz DNA

Indicate whether the sentence or statement is true or false.

Despite years of research, the actual structure of the DNA molecule is still unknown.

Franklin’s X-ray diffraction images suggested that the DNA molecule resembled a tightly coiled spring, a shape called a helix.

In all living things, DNA replication must occur after cell division.

Multiple DNA polymerases may become attached to more than one portion of a DNA molecule at once, speeding up the rate of replication.

Before a DNA molecule can replicate itself, it must make itself more compact. This is accomplished by the double helix coiling up on itself.

Complete each sentence or statement.

A DNA subunit composed of a phosphate group, a five-carbon sugar, and a nitrogen-containing base is called a(n) ____________________.

The name of the five-carbon sugar that makes up a part of the backbone of molecules of DNA is ____________________.

Watson and Crick determined that DNA molecules have the shape of a(n) ____________________.

Due to the strict pairing of nitrogen base pairs in DNA molecules, the two strands are said to be ____________________ to each other.

According to base-pairing rules, adenine pairs with ____________________ and guanine pairs with ____________________.

The enzyme that is responsible for replicating molecules of DNA by attaching complementary bases in the correct sequence is ____________________.

Enzymes called ____________________ are responsible for unwinding the DNA double helix by breaking the hydrogen bonds that hold the complementary strands together.

The process by which DNA copies itself is called ____________________.

Molecules of ____________________ carry instructions for protein synthesis from the nucleus to the cytoplasm.

The nitrogen-containing base that is found only in RNA is ____________________.

The enzyme responsible for making RNA is called ____________________.

The form of ribonucleic acid that carries genetic information from the DNA to the ribosomes is ____________________.