AP Biology Midterm Review

Which of the following could NOT be an mRNA strand?

• CGTTAC
• AUGCAA
• CCGACG
• CUUGAA

If an sample of double stranded DNA contains 30% T approximately what % will be C?

• 20%

• 30%

• 70%

• 10%

Which or the following is NOT part of a nucleotide?

• amino acid
• nitrogen base
• phosphate group
• 5 carbon sugar

Fats, sugars, proteins and other organic molecules are held together by -

• covalent bonds
• hydrogen bonds
• ionic bonds
• peptide bonds

A dehydration synthesis reaction - (*2 correct answers*)

• produces water

• uses water

• combines monomers

• splits monomers

A change to the primary structure of a protein -

• may lead to change in the secondary and tertiary structure
• will have no effect on tertiary structure
• will denature the protein
• may change structure, but not function

If a cell is placed in a hypertonic solution -

• water will leave the cell
• water will move into the cell
• the cell will lose salts
• receptor proteins will denature

As a cell increases in size, the surface area to volume ratio

• decreases, making the cell less efficient
• decreases, making the cell more efficient
• increases, making the cell more efficient
• increases, making the cell less efficient

Eukaryotic organisms can be larger and more complex than prokaryotes because -

• internal membrane compartmentalize cellular functions
• their individuals cells are smaller and more efficient
• they have evolved for longer than prokaryotes
• they use specialized signalling pathways that prokaryotes do not have

The cell membrane contains -

• Polar heads and nonpolar tails
• Polar heads and polar tails
• Nonpolar heads and nonpolar tails
• Nonpolar heads and polar tails