Unit 1 Biochemistry

The main purpose/function of nucleic acids is _____.

• storing energy

• carrying genetic information

• membrane structure

• all of the above

Select the molecule that is the monomer of proteins.

• 
• 
• 
• 

Tags

NGSS.HS-LS1-6

NGSS.HS-LS1-1

Which of the following is true of both starch and cellulose?

• They are both polysaccharides.

• They have the same structure.

• They can both be digested by humans

• They are both used for energy storage in plants.

DNA molecules are made of 2 strands that form a double helix.

Hydrogen bonds connect nucleotides from each side and “zip” the DNA together.

Why are hydrogen bonds useful in this case?

• They are very strong, and help protect the DNA

• They are polar bonds, which means DNA can mix with water.

• They are weak interactions, which means the 2 strands can easily be separated and recombined when DNA is read.

• They are ionic, and give DNA a negative charge.

How do you know if a molecule is organic?

• It has polar bonds

• It has hydrogen

• It has carbon

• It has carbon and hydrogen bound together

What elements are present in nucleic acids?

• CHO

• CHON

• CHOP

• CHONP

What elements are present in proteins?

• CHO

• CHON

• CHONP

• CHOP

What elements are present in carbohydrates?

• CHO

• CHON

• CHONP

• CHOP

Tags

NGSS.HS-LS1-6

Which part of an amino acid has different chemical properties?

• the amino group

• the peptide bond

• the R group (or side chain)

• the carboxyl group

What type of molecules repel water?

• hydrophobic

• hydrophilic

• phospholipids

• polar molecules