Which of the following nucleotides is only found in RNA?

A. Guanine

B. Thymine

C. Uracil

D. Adenine

Answer Explanation:

Uracil is the nucleotide that is only found in RNA. The other nucleotides are found in both DNA and RNA

Therefore, the Correct Answer is C.

Q #1: Which of the following correctly orders structures from simple to complex?

A. Organs, tissues, cells, atoms

B. Cell, tissues, atoms, organs

C. Atoms, organs, tissues, cells

D. Atoms, cells, tissues, organs

Answer Explanation

Rationale

Atoms are the smallest and most basic units of matter, and they can combine to form molecules. Cells are the basic units of life, and they are made of molecules. Tissues are groups of cells that work together to perform a specific function, such as muscle tissue or nerve tissue. Organs are collections of tissues that form a larger structure.
Q #2: A slice of apple left on a table slowly goes brown due to an enzymatic reaction. Dipping the apple slice in lemon juice prevents it from browning Which of the following best explains this result?

A. Lemon juice has enzymes which reverse the browning reaction

B. Lemon juice has a pH which inactivates the enzymes

C. Lemon juice functions to bleach the brown material

D. Lemon juice functions to dilute the brown material

Answer Explanation

Browning of the apple surface is due to the action of the enzyme polyphenol oxidase. Lemon juice is acidic and lowers the pH of the apple's surface. This inactivates the enzyme polyphenol oxidase, which works best at a neutral pH. This in turn reduces the browning action on the apple.
Q #3: Escherichia cell is plated on nutrient agar plates that each contain a different type of antibiotic. The shaded area represents growth of the bacteria. Which of the following plates contains bacteria that were most resistant to the antibiotic

A. A

B. B

C. C

D. D

Answer Explanation

This is the plate with the most growth despite the presence of antibiotic cover.

Free Access on TEAS 7 Exams and Study Notes

Access to all TEAS 7 Exams
Performance Tracking and Analysis
Well Documented and Explained Questions and Answers
2000+ Questions and Correct Answers: Answers Well Explained
Libary of Detailed StudyNotes
Topical Questions and Answers on Examinable topics

Join Now

Which of the following nucleotides is only found in RNA?

More Questions on TEAS 7 Science

Q #1: Which of the following correctly orders structures from simple to complex?

Answer Explanation

Q #2: A slice of apple left on a table slowly goes brown due to an enzymatic reaction. Dipping the apple slice in lemon juice prevents it from browning Which of the following best explains this result?

Answer Explanation

Q #3: Escherichia cell is plated on nutrient agar plates that each contain a different type of antibiotic. The shaded area represents growth of the bacteria. Which of the following plates contains bacteria that were most resistant to the antibiotic

Answer Explanation

Free Access on TEAS 7 Exams and Study Notes

TEAS 7 Exams (Q&A)

TEAS 7 Study Notes

TEAS 7 Topical Tests

TEAS 7 Study Guides

Quick Links

Refer a Friend