Novare General Bio 2.3.3 - Proteins and Nucleic Acids

What is defined as a biomolecule made of repeating units called amino acids?

• A protein.

• A carbohydrate.

• A lipid.

• A nucleic acid.

An amino acid is made up of:

1. 1. central ​ (a)  

2. NH2 group, aka ​ (b)  

3. 3. COOH, aka ​ (c)  

4. R group, which is a ​ (d)   .

The ​ (e)   identifies which amino acid you have.

• C atom
• (amine)
• (a carboxyl group)
• (side chain)
• R group
• Oxygen atom
• Hydroxyl group
• Phosphate group

What do proteins carry out in cells?

• Cellular functions

• Photosynthesis

• DNA replication

• Cellular respiration

How many different amino acids are there that can combine in numerous ways to make different proteins?

• 20

• 15

• 25

• 30

Amino acids are monomers made up of a central carbon atom, a NH2 group, a COOH group, and an R group.

• True

• False

Amino acids have many properties. They can be hydrophobic or hydrophilic. They can be charged positive or negative. Some bond covalently, while some don't. True or False?

• True

• False

What is a group of amino acids bonded together in a single, straight chain? They start a protein molecule.

• Polypeptide
• Amino acid
• Dipeptide
• Protein chain

Fill in the blank: The primary structure of a protein is the specific sequence of ______ present in the single straight chain that starts the protein structure.

• amino acids

• nucleotides

• sugars

• lipids

What is the type of protein structure that specifies the regions of alpha helixes or beta sheets?

• Primary structure
• Secondary structure
• Tertiary structure
• Quaternary structure

What is the type of protein structure that refers to the single straight chain of amino acids, which is know as a polypeptide?

• Primary structure
• Secondary structure
• Tertiary structure
• Quaternary structure