Keystone Biology: Chemical Basis of Life

Question 1

What is polarity in biochemistry?

Answer 1

An UNEVEN charge across a molecule

Question 2

TRUE or FALSE: Water has a partially POSITIVE side (on oxygen) and a partially NEGATIVE side (carbon end)

Answer 2

umm?? false?! Water has a partially positive side (on oxygen) and a partially negative side (HYDROGEN end)

Question 3

Explain why polarity is important.

Answer 3

Because this is what creates hydrogen bonding in water.

Question 4

Cohesion

Answer 4

Water molecules that “stick” together.

Question 5

EXPLAIN SURFACE TENSION GO

Answer 5

Resistance of the surface of the water to being broken.

Question 6

MULTIPLE CHOICE: Choose the BEST answer to define what adhesion is.
A. Water molecules “sticking” to liquid.
B. Water molecules “sticking” to solids.
C. Water molecules “sticking” to another substance.
D. Water molecules “sticking” to themselves.

Answer 6

C. Water molecules “sticking” to another substance.

Question 7

What are COVALENT bonds?

Answer 7

Covalent bonds share electrons. They also make up most ORGANIC bonds in organisms

Question 8

Ionic Bonds are..?

Answer 8

They form when electrons are transferred.

Question 9

TRUE or FALSE: Solution is made up of salt which is then dissolved in the solvent.

Answer 9

FALSE: It is made of SOLUTE which is dissolved in the solvent.