Chapter 12 Review

Newton's third law states that action-reaction forces are equal in magnitude and _____ in direction.

Tags

NGSS.MS-PS2-1

A powerful force of attraction that acts only on the neutrons and protons in the nucleus of an atom, holding them together.

• strong nuclear force

• weak nuclear

  force

• gravitational

  force

• electromagnetic force

Tags

NGSS.HS-PS1-8

Which is the weakest universal force?

• gravitational

  force

• strong nuclear force

• weak nuclear

  force

• electromagnetic force

If an object has a mass of 300 kg and accelerates at 1.5 m/s², what is the net force acting on the object? (in N, don't include units in your answer).

Tags

NGSS.HS-PS2-1

States that if no net force acts on a system, then the total momentum of the system does not change.

• law of conservation of mass

• law of conservation of energy

• law of conservation of momentum

• law of conservation of velocity

Tags

NGSS.HS-PS2-2

Which of the following statements correctly describes Chargaff's contribution to the study of DNA?

• Chargaff hypothesized that DNA was a double helix, but he did not produce the image that proved this fact.

• Chargaff's experiments conclusively proved that DNA was made of nucleotides, but he could not show that there are four types of nitrogenous bases.

• Chargaff showed that adenine and thymine were found in equal percentages in DNA, but he did not know this was because of base pairing.

• Chargaff's work proved that DNA could be made using radioactive nucleotides, but did not show that DNA could be transferred from one organism to another.

Which of the following is a nucleotide found in DNA?

• adenine, phosphate group, thymine

• cytosine, phosphate group, guanine

• deoxyribose, phosphate group, polymerase

• deoxyribose, phosphate group, cytosine

Tags

NGSS.HS-LS3-1

Which of the following best describes Rosalind Franklin's contribution to our understanding of the structure of DNA?

• She created many models of DNA based on what was knows about its properties.

• She used an X-ray beam to produce an image of the molecule.

• She discovered the amounts of guanine and cytosine were almost exactly the same.

• She found that DNA was the transforming material using radioactive phosphorus and sulfur.

Which scientist(s) figured out that the shape of a DNA molecule is a double helix?

• Hershey and Chase

• Griffith

• Watson, Franlkin, and Crick

• Franklin

Which of the following forms a base pair with thymine?

• deoxyribose

• adenine

• guanine

• cytosine