Cutting DNA with a particular restriction enzyme produces DNA fragments that can be separated by?

Answer 1

Question 1Correct

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One of the proposed solutions to global warming is to grow a large number of trees. This could be effective because:

Select one:

a. trees would move carbon from CO2 in the atmosphere to organic molecules.

b. when decomposed, plant carbon is impossible to convert back to CO2.

c. the gross primary production of trees moves CO2 into soil.

d. plant carbon is different from atmospheric carbon.

e. plants are the base of all ecological food chains.

FeedbackThe correct answer is: trees would move carbon from CO2 in the atmosphere to organic molecules.. Question 2Correct

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Oxygen has a high concentration in the lungs. It move into the blood where there is a lower concentration of oxygen. This is an example of which of the following processes?

Select one:

a. Diffusion

b. Active transport

c. Osmosis

d. Phagocytosis

FeedbackThe correct answer is: Diffusion. Question 3Correct

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What have we learned from the study of fossils?

Select one:

a. The oldest fossils are found in the highest rock layers

b. Many animals that lived in the past are different from animals today

c. Humans and dinosaurs lived at the same time.

d. Most of the animals from the past are just like animals today

FeedbackThe correct answer is: Many animals that lived in the past are different from animals today. Question 4Incorrect

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Nondisjunction will result in which of the following?

Select one:

a. Trisomy

b. A recessive trait

c. An X-linked trait

d. A dominate trait

FeedbackThe correct answer is: Trisomy. Question 5Correct

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What is the abnormality associated with this karyotype?

Select one:

a. Down syndrome

b. Klienfelter syndrome

c. Turner syndrome

d. Edward syndrome

e. Patau syndrome

FeedbackThe correct answer is:

Down syndrome .

Question 6Correct

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The "ozone hole" is caused by the:

Select one:

a. buildup of toxic ozone in the troposphere over cities such as Los Angeles from human-caused pollution.

b. depletion of ozone in the troposphere by chemicals such as CFCs.

c. depletion of ozone in the troposphere due to greenhouse gases.

d. increase in warming due to high levels of ozone in the troposphere.

e. depletion of ozone in the stratosphere by chemicals such as CFCs.

FeedbackThe correct answer is: depletion of ozone in the stratosphere by chemicals such as CFCs.. Question 7Correct

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If the sequence TCGTA was used as a template in DNA replication, what would the sequence of bases be on the newly synthesized strand?

Select one:

a. AGCAT

b. TCGTA

c. ATGCT

d. CTACG

e. GCATC

FeedbackThe correct answer is: AGCAT. Question 8Correct

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Too much nutrient runoff, particularly from nitrogen fertilizers, can cause dead zones in bodies of water.

Select one:

True

False

FeedbackThe correct answer is 'True'. Question 9Correct

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DNA is a double stranded molecule

Select one:

True

False

FeedbackThe correct answer is 'True'. Question 10Correct

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RNA is a double stranded molecule

Select one:

True

False

FeedbackThe correct answer is 'False'. Question 11Correct

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A tentative explanation of an observation is which of the following?

Select one:

a. Experiment

b. Hypothesis

c. Law

d. Scientific theory

FeedbackThe correct answer is: Hypothesis. Question 12Correct

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Cancer is the result of uncontrolled cell division

Select one:

True

False

FeedbackThe correct answer is 'True'. Question 13Correct

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Which of the following is a biotic factor of an ecosystem?

Select one:

a. oxygen

b. soil minerals

c. water

d. bacteria

FeedbackThe correct answer is: bacteria. Question 14Correct

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Who developed the binomial system for naming species?

Select one:

a. Stanley Miller

b. Carolus Linnaeus

c. Gregor Mendel

d. Charles Darwin

e. Watson and Crick

FeedbackThe correct answer is: Carolus Linnaeus. Question 15Correct

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A gene pool is all the alleles in a population

Select one:

True

False

FeedbackThe correct answer is 'True'. Question 16Correct

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A change in a gene or chromosome is which of the following?

Select one:

a. Mutation

b. Phenotype

c. Allele

d. Genotype

FeedbackThe correct answer is: Mutation. Question 17Correct

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X-linked recessive traits are more common in males than females.

Select one:

True

False

FeedbackThe correct answer is 'True'. Question 18Correct

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A man with type O blood marries a woman with type Ablood. What is the chance of them having a child with type

O blood? (Assume she is heterozygous = AO)

Select one:

a. 0%

b. 50%

c. 100%

d. 75%

e. 25%

FeedbackThe correct answer is: 50%. Question 19Incorrect

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John has just eaten a very salty meal and the amount of salt in his blood has increased above normal. Water enters the blood to raise his blood pressure. This is an example of which of the following?

Select one:

a. Phagocytosis

b. Osmosis

c. Active Transport

d. Diffusion

FeedbackThe correct answer is: Osmosis. Question 20Incorrect

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Which large animals were wiped out by the Cretaceous extinction?

Select one:

a. sharks

b. mammoth

c. dinosaurs

d. whales

FeedbackThe correct answer is: dinosaurs. Question 21Correct

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During which of these eras were dinosaurs dominant?

Select one:

a. Paleozoic

b. Mesozoic

c. Cenozoic

d. Precambrian

FeedbackThe correct answer is: Mesozoic. Question 22Correct

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The studies of DNA have confirmed the same basic evolutionary pattern that was established with fossils.

Select one:

True

False

FeedbackThe correct answer is 'True'. Question 23Correct

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Dwarfism is a dominant trait. A heterozygous dwarf marries a person with normal height. What is the chance they will have a child that is a dwarf?

Select one:

a. 25%

b. 50%

c. 75%

d. 100%

e. 0%

FeedbackThe correct answer is: 50%. Question 24Correct

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Altering cells or biological molecules for a specific application is:

Select one:

a. Biology

b. Biotechnology

c. Genetics

d. Photosynthesis

FeedbackThe correct answer is: Biotechnology. Question 25Correct

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Which aspect of biotechnology has been used to clear innocent people of crimes they were accused of committing?

Select one:

a. transformed plasmids

b. restriction enzymes

c. forensic DNA typing

d. transgenic organisms

FeedbackThe correct answer is: forensic DNA typing.

Answer 2

restriction enzymes