B9A

Like complex carbohydrates, proteins are biomolecules that serve many functions and can be chemically broken down and restructured. Both proteins and complex carbohydrates are which of the following?

• polymers of smaller subunits

• sequences of sugars

• lipids of large molecules

• nucleotides of DNA

Carbohydrates are more easily metabolized than lipids. However, on a gram-for-gram basis lipids provide cells with more -

• nitrogen

• proteins

• structure

• energy

Which of the following biomolecules typically contains both nitrogen and phosphate?

• lipid

• protein

• nucleic acid

• carbohydrate

A student preparing for a hike wants to pack a snack that has biomolecules that provide quickly available energy but few excess calories. Which nutrition label lists the best combination of biomolecules that provide quickly available energy while providing the fewest calories from other types of biomolecules?

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The differences between two molecules include the type of sugar that forms a section of the molecules and the identity of one of the four nitrogenous bases that make up another section of the molecules. These two molecules are -

• proteins

• lipids

• nucleic acids

• complex carbohydrates

Four different nucleotides are used as building blocks of DNA. Which of the following can be used to distinguish one nucleotide from another?

• the nitrogenous base

• the shape of the deoxyribose sugar

• the length of the phosphate group

• the type of fatty acid

The complex carbohydrates pictured below are made by linking molecules of glucose. In all three complex carbohydrates, the subunits of glucose are bonded together differently. Because they have different structures, they most likely -

• contain different chemical elements

• form different proteins

• carry different nucleotides

• perform different functions

Students were given a list of seven elements and asked to identify the four elements that are most abundant in biomolecules. Which table correctly identifies the four most-abundant elements in biomolecules?

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Proteins and carbohydrates have many functions in the body of an organism. Specific protein and carbohydrates perform specific tasks. Information about a protein and a carbohydrate are given below. How are ferritin and glycogen similar in their primary functions for an organism?

• both store materials needed by the organism

• both store energy use by the organism

• both support the structure of the organism

• both store information for the organism

An advertisement for a health supplement for dogs claims to build lean muscle and strengthen tendons and ligaments, as well as provide energy. Which two biomolecules must the supplement contain to provide these benefits?

• carbohydrates and lipids

• proteins and carbohydrates

• nucleic acids and carbohydrates

• lipids and nucleic acids