Biochemistry quiz

What makes a molecule polar?

• Equal sharing of valence electrons
• Unequal sharing of valence electrons
• Stealing of electrons
• Temporary charges that come and go

Tags

NGSS.HS-PS1-1

Which of the following conclusions can be drawn from this graph?

• The optimum pH of the enzyme is 6.6.
  
• The optimum pH of the enzyme is 5.8
  
• The enzyme’s activity increases as pH increases 5.0 to 9.0
  
• The enzyme’s activity is greater around pH of 8.0 .
  

A solution with a pH of 8.6 would be...

• Acid
• Base
• Neutral
• Acid and Base

Waters ability to move from the roots of trees to the leaves is do to its-

• Its adhesion and cohesion
• surface tension
  
• lower density as a solid
• high heat capacity
  

Which property makes water molecules stick to other water molecules?

• adhesion
• cohesion
• capillary action
• polarity

The fact that ice floats on liquid water is due to the fact that water's solid is ___________ than it's liquid form

• less polar
• more polar
• less dense
• more dense

Tags

NGSS.MS-PS1-4

Water molecules require a lot of energy to separate one from the others.  This gives water a high

• density
• polarity
• solvency
• specific heat

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

Which macromolecule is an essential component of cell membranes?

• carbohydrates

• proteins

• lipids

• nucleic acids

Where are protons and neutrons located in an atom?

• nucleus

• nucleolus

• electron shells

• outer membrane

Tags

NGSS.HS-PS1-8

What are the building blocks (monomers) for protein?

• polysaccharides

• amino acids

• monosaccharides

• fatty acids

Tags

NGSS.HS-LS1-6