Gel electrophoresis To separate genomic DNA fragments by size, which of these laboratory methods is most useful?

A. Filtration

B. Titration

C. Electrophoresis

D. Spectrophotometry

Answer Explanation:

Electrophoresis is a lab method that is commonly used to separate charge molecules based on their size. Some of the charged molecules include DNA, RNA, and proteins.

Therefore, the Correct Answer is C.

Q #1: The process that moves nutrients into the blood or lymph is

A. digestion

B. ingestion

C. elimination

D. absorption

Answer Explanation

Digestion is the breakdown of large insoluble food molecules into small water-soluble food molecules so that they can be absorbed into the watery blood plasma.

Ingestion is the process of taking food, drink, or another substance into the body by swallowing or absorbing it.

Elimination refers to the removal of indigestible wastes through the anus, in the form of feaces.
Q #2: Which of these infectious agents do not have nucleic acid?

A. viroids

B. viruses

C. bacteria

D. prions

Answer Explanation
Q #3: A myocardial infarction affects which of the following blood vessels of the heart?

A. Aorta

B. Vena cava

C. Pulmonary

D. Coronary

Answer Explanation

A myocardial infarction refers to heart attack, which result from blockage of blood flowing into the heart.

Blocking is caused by the deposition of fat or cholesterol that forms plaque on the surface of coronary arteries, which supply blood to the heart.

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Gel electrophoresis To separate genomic DNA fragments by size, which of these laboratory methods is most useful?

More Questions on TEAS 7 Science

Q #1: The process that moves nutrients into the blood or lymph is

Answer Explanation

Q #2: Which of these infectious agents do not have nucleic acid?

Answer Explanation

Q #3: A myocardial infarction affects which of the following blood vessels of the heart?

Answer Explanation

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