Question

What makes up cell membranes and is used to create hormones?
cholesterol
starch
glucose
hydrocarbon
GPT-4o mini
Cholesterol is what makes up cell membranes and is also used to create hormones. It is a type of lipid that contributes to the fluidity and stability of cell membranes, and it serves as a precursor for the synthesis of steroid hormones. Starch and glucose are carbohydrates, while hydrocarbons are organic compounds that consist mainly of hydrogen and carbon but are not primarily involved in forming cell membranes or hormones in the same way as cholesterol.
37432
What makes up cell membranes and is used to create hormones?

cholesterol
starch
glucose
hydrocarbon
GPT-4o mini
The correct answer is **cholesterol**. Cholesterol is a lipid that is a crucial component of cell membranes, providing structural integrity and fluidity. Additionally, it serves as a precursor for the synthesis of steroid hormones. The other options, starch and glucose, are carbohydrates, while hydrocarbons are organic compounds that consist of only hydrogen and carbon, and do not fulfill the specific roles mentioned in the question.
37432
All biomolecules have the following traits except
a carbon backbone.
covalent bonds.
nitrogen elements.
hydrogen elements.
GPT-4o mini
The statement "All biomolecules have the following traits except" would be best completed with **nitrogen elements**.

While many biomolecules (such as proteins and nucleic acids) do contain nitrogen, not all biomolecules necessarily include nitrogen. For example, carbohydrates and lipids do not require nitrogen in their structures. In contrast, having a carbon backbone, covalent bonds, and hydrogen elements are traits common to all biomolecules.
37432

All biomolecules have the following traits except

a carbon backbone.
covalent bonds.
nitrogen elements.
hydrogen elements.
GPT-4o mini
The correct option that completes the statement "All biomolecules have the following traits except" is **nitrogen elements**.

While many biomolecules contain nitrogen (such as proteins and nucleic acids), not all biomolecules do. Carbohydrates and many lipids do not necessarily contain nitrogen. However, having a carbon backbone, covalent bonds, and hydrogen elements are characteristics that are common to all biomolecules.
37432
What enzyme breaks down starch in your saliva?
amylase
pepsin
trypsin
lipase
GPT-4o mini
The enzyme that breaks down starch in your saliva is **amylase**. Amylase begins the process of starch digestion by hydrolyzing the glycosidic bonds in starch, breaking it down into smaller carbohydrates and sugars. Pepsin is involved in protein digestion in the stomach, trypsin is a pancreatic enzyme that also digests proteins, and lipase is involved in the digestion of fats.
37432
What enzyme breaks down starch in your saliva?
amylase
pepsin
trypsin
lipase
GPT-4o mini
The enzyme that breaks down starch in your saliva is **amylase**. Specifically, salivary amylase (also known as ptyalin) begins the digestion of starches into simpler sugars while you chew your food. Pepsin digests proteins in the stomach, trypsin is another protein-digesting enzyme produced by the pancreas, and lipase is responsible for fat digestion.
37432
Which soil-based compounds do plants use to create amino acids from glucose?
hydrogen
nitrogen
carbon
fluoride
GPT-4o mini
Plants use **nitrogen** from soil-based compounds to create amino acids from glucose. Although glucose provides the carbon skeleton for amino acids, nitrogen is an essential component of amino acids, which plants obtain primarily from the soil in the form of nitrates or ammonium. Hydrogen and carbon are also important to plant metabolism, but nitrogen is specifically critical for synthesizing amino acids. Fluoride is not used by plants in this context.
37432

Which soil-based compounds do plants use to create amino acids from glucose?

hydrogen
nitrogen
carbon
fluoride
GPT-4o mini
Plants use **nitrogen** from soil-based compounds to create amino acids from glucose. While glucose provides the carbon backbone needed for the formation of amino acids, nitrogen is an essential component of amino acids, which plants typically obtain from the soil in the form of nitrates and ammonium. Therefore, nitrogen is the correct answer to your question.
37432
What are the building blocks of proteins?
starch
sugars
fatty acids
amino acids
GPT-4o mini
The building blocks of proteins are **amino acids**. Proteins are polymers made up of long chains of amino acids linked together by peptide bonds. Starch is a carbohydrate, sugars are also carbohydrates, and fatty acids are the building blocks of lipids (fats), so they do not serve as building blocks for proteins.
37432
What are the building blocks of proteins?

starch
sugars
fatty acids
amino acids
GPT-4o mini
The building blocks of proteins are **amino acids**. Proteins are made up of long chains of amino acids linked together by peptide bonds. Starch is a carbohydrate, sugars are also carbohydrates, and fatty acids are components of lipids, so none of those serve as building blocks for proteins. Therefore, the correct answer is amino acids.