DNA

During interphase

• DNA lines up in the middle of the cell and DNA attaches to spindle fibers

• 2 new nuclei form

• 2 new identical cells are created

• DNA gets copied

rules of base pairing are explained by which structural feature of DNA?

• Each strand of DNA contains a phosphate and sugar backbone.

• The nucleotides of DNA may be arranged in a wide variety of sequences.

• DNA is double stranded, and covalent bonds between identical nucleotides hold the two strands together.

• DNA is double stranded, and hydrogen bonds between base pairs hold the two strands together.

The model of the double-helix model of the DNA molecule resembles a twisted ladder. What makes up the rungs of the twisted ladder?

• paired phosphate groups

• paired nitrogenous bases

• paired sugars

• hydrogen and oxygen atoms

This figure shows a section of a double-stranded DNA molecule. What aspects of the structure of DNA are explained by this model? Select three answer choices.

• Paired nucleotides are held together by covalent bonds.

• Adenine is paired with thymine and guanine is paired with cytosine.

• Paired nucleotides are held together by hydrogen bonds.

• The two strands of DNA each have phosphate-sugar backbones.

• The numbers of each nucleotide determine genetic information.

The sequence of nitrogenous bases on a portion of a strand of DNA is shown in the diagram. From left to right, what is the corresponding sequence of the complementary strand?

• C C A C T G A

• G G U G T A T

• G G T G A C T

• T T A G A T C

The diagram shows a model of DNA replication. Which of the following labels should NOT be added to the model?

• DNA polymerase

• Replication fork

• RNA polymerase

What is the primary function of DNA in living organisms?

• To store genetic information

• To provide energy

• To transport nutrients

• To protect cells from damage

Which scientist is credited with the discovery of the double helix structure of DNA?

• Albert Einstein

• Isaac Newton

• James Watson and Francis Crick

• Marie Curie

In which part of the cell is DNA primarily located?

• Cytoplasm

• Nucleus

• Ribosome

• Mitochondria

What does DNA stand for?

• Deoxyribonucleic Acid

• Dioxyribonucleic Acid

• Deoxyribose Nucleic Acid

• Dioxyribose Nucleic Acid