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Molecular Biology: The Cell Structure and Function

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Molecular Biology: The Cell Structure and Function

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Questions and Answers

Which atom in the sugar molecule is connected to the phosphorus atom in a phosphate group?

7-carbon

3-carbon

5-carbon (correct)

1-carbon

What is the main difference between deoxyribose and ribose sugars?

Deoxyribose has one more carbon atom.

Ribose has an extra carbon atom.

Deoxyribose has one less oxygen atom. (correct)

Ribose has an additional oxygen atom.

Where is the nitrogen base connected within a nucleotide?

7-carbon

3-carbon

5-carbon (correct)

9-carbon

In DNA, which base replaces thymine in RNA?

Uracil Signup and view all the answers

How are nucleotides connected to form the sugar-phosphate backbone in DNA or RNA?

Phosphodiester bond between 5-carbon and phosphate group Signup and view all the answers

What are the three main components of a nucleotide?

Nitrogenous base, pentose sugar, and phosphate group Signup and view all the answers

Which of the following statements about cells is incorrect?

All living things consist of only one cell. Signup and view all the answers

Which of the following is a purine nitrogenous base found in both DNA and RNA?

Guanine Signup and view all the answers

Which of the following statements about prokaryotic cells is correct?

They include bacteria and archaea. Signup and view all the answers

What is the difference between the sugar components of DNA and RNA?

DNA has deoxyribose, while RNA has ribose. Signup and view all the answers

What is the main difference between eukaryotic and prokaryotic cells?

Eukaryotic cells have a nucleus, while prokaryotic cells do not. Signup and view all the answers