Unit 1 Review

Identify the pairing and number of bonds in DNA double helix

• A pairs with T (2 bonds) & G pairs with C (3 bonds)

• A pairs with G (2 bonds) & T pairs with C (3 bonds)

• A pairs with T (3 bonds) & G pairs with C (2 bonds)

• A pairs with G (3 bonds) & T pairs with C (2 bonds)

Which protein structure involves the peptide bonds between amino acids?

• primary

• secondary

• tertiary

• quaternary

DNA and RNA differ on many qualities, which of the following is NOT a difference?

• Sugar

• Nitrogenous Base

• Phosphate Group

• Strandedness

What type of bond is found BETWEEN water molecules?

• Hydrogen bonds

• Ionic bonds

• Nonpolar covalent bonds

• Polar covalent bonds

Cohesive force between water molecules and adhesive force between water molecules and other molecules enable this phenomenon to occur.

• Surface tension

• Capillary action

• Float on water

• Photosynthesis

Tags

NGSS.HS-ESS2-5

When water molecules stick easily to other water molecules, this is called what?

• Cohesion

• Adhesion

• Solution

• Polar molecule

The fact that ice floats on liquid water is due to the fact that water's solid form is _____________ than its liquid form.

• Less polar

• More polar

• Less dense

• More dense

Which statement explains why water molecules stick together?

• Both sides are negative

• One side has a positive charge and the other side has a negative charge

• One side has a negative charge and the other side has a neutral charge

• Both sides are positive

Why is the bottom part of this triglyceride bent?

• Nitrogen is added

• It just is

• Deformed

• Double bond

Which of the following describes why lipids are hydrophobic?

• Lipids are composed mostly of hydrocarbons which are nonpolar

• Lipids have hydrogen bonds that repel the hydrogen bonds in water

• Lipids have more neutrons in their atoms, making the compound neutral

• Lipids are gaseous materials that do not dissolve in water