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Biomolecules and Organic Compounds

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Questions and Answers

Which of the following biomolecules has a carbonyl group?

Carboxylic acid

Alcohol

Amine

Aldehyde (correct)

What is a characteristic of carbon atoms that is of great significance in biology?

Their ability to form double bonds with oxygen atoms

Their ability to form triple bonds with nitrogen atoms

Their ability to form single bonds with hydrogen atoms only

Their ability to form very stable single bonds with up to four other carbon atoms (correct)

What is the percentage of total mass of most cells that is made up by the four most abundant elements in living organisms?

Less than 95%

Around 90%

Exactly 98%

More than 99% (correct)

What is the primary element that the chemistry of living things is organized around?

Carbon Signup and view all the answers

What is a characteristic of many biomolecules?

They are poly-functional Signup and view all the answers

What is the approximate angle between any two bonds in a carbon atom?

109.5 degrees Signup and view all the answers

What is the average bond length of a single carbon bond?

0.154mm Signup and view all the answers

What is a characteristic of a double bond in carbon atoms?

It is shorter and more rigid than a single bond Signup and view all the answers

What is unique about carbon's ability to form molecules?

It can form molecules of widely different sizes, shapes, and composition Signup and view all the answers

What is a possible reason why carbon compounds were selected for the molecular machinery of cells?

Carbon's bonding versatility with itself and other elements Signup and view all the answers