Carbon has four electrons in its outer shell. Why does this make it important to life?(1 point)

Question

Responses

The outermost shell is full, making it a stable element that can bond to water.
The outermost shell is full, making it a stable element that can bond to water.

The outermost shell can form up to four covalent bonds and this allows it to form biomolecules.
The outermost shell can form up to four covalent bonds and this allows it to form biomolecules.

The outermost shell can only bond with hydrogen and other carbon atoms.
The outermost shell can only bond with hydrogen and other carbon atoms.

The outermost shell never fills making it unstable and unable to bond to other carbon molecules.

Answer 1

The correct response is:

The outermost shell can form up to four covalent bonds and this allows it to form biomolecules.

This characteristic of carbon enables it to form a wide variety of complex and diverse molecules essential for life, including carbohydrates, proteins, lipids, and nucleic acids.

Answer 2

What is the definition of a hydrocarbon?(1 point)
Responses

a carbon, oxygen, and hydrogen bonded together.
a carbon, oxygen, and hydrogen bonded together.

a large chain of carbons and hydrogens bonded together
a large chain of carbons and hydrogens bonded together

polysaccarides that are used as a source of energy.
polysaccarides that are used as a source of energy.

electrons shared between two different atoms

Answer 3

The correct response is:

a large chain of carbons and hydrogens bonded together.

Hydrocarbons are organic compounds consisting entirely of hydrogen and carbon atoms, and they can be either linear or branched chains.

Answer 4

What do amino acids, fatty acids, and sugars (monosaccharides) have in common?(1 point)
Responses

They are made of carbon, oxygen, and hydrogen.
They are made of carbon, oxygen, and hydrogen.

They are made up of carbon, phosphate, and hydrogen
They are made up of carbon, phosphate, and hydrogen

They are made of carbon, oxygen, and nitrogen.
They are made of carbon, oxygen, and nitrogen.

They are made up of phosphate, nitrogen, and hydrogen

Answer 5

The correct response is:

They are made of carbon, oxygen, and hydrogen.

Amino acids, fatty acids, and monosaccharides (sugars) all contain carbon, hydrogen, and oxygen as their primary elements. Additionally, amino acids also contain nitrogen, but the commonality in the given options is the presence of carbon, oxygen, and hydrogen.

Answer 6

Amino acids have a general structure that is the same across all of them. They also have a structure that makes them unique. What makes amino acids unique from one another?(1 point)
Responses

The long strands of glucose molecules that fold the proteins.
The long strands of glucose molecules that fold the proteins.

The amino group that is made up of nitrogen and two hydrogen atoms.
The amino group that is made up of nitrogen and two hydrogen atoms.

The R group that hangs off the side of the carboxyl group.
The R group that hangs off the side of the carboxyl group.

The carboxyl group that consists of a carbon bonded to an OH group

Answer 7

The correct response is:

The R group that hangs off the side of the carboxyl group.

The R group, also known as the side chain, is what makes each amino acid unique. Different R groups give each amino acid its distinct properties and characteristics.

Answer 8

Which compound is a carbohydrate made up of long glucose chains, and commonly found in plants?(1 point)
Responses

Answer 9

The correct response is:

Starch.

Starch is a carbohydrate made up of long chains of glucose molecules and is commonly found in plants, where it serves as a form of energy storage. Another similar carbohydrate found in plants is cellulose, which is also composed of glucose but arranged differently and provides structural support.

Answer 10

Glucose is a hydrocarbon that can be used to produce other biomolecules. Nitrogen can bond with glucose to make a biomolecule that can perform cellular functions. Which compound contains nitrogen?(1 point)

Answer 11

The correct response is:

Amino acids.

Amino acids contain nitrogen and can be formed by the combination of glucose and nitrogen-containing compounds. Amino acids are the building blocks of proteins, which perform various cellular functions.