Biology test 2

Question 0

Why is carbon so special compared to other elements?

Answer 0

Carbon atoms can bond to one another to form a lot of different structures.

Question 1

In a water molecule:
oxygen=
Hydrogen=

Answer 1

Oxygen = negative
Hydrogen = positive

Question 2

Amino acid is to protein as

Answer 2

Simple sugar is to starch

Question 3

Enzymes are…

Answer 3

Proteins

Question 4

Activation energy

Answer 4

The energy needed to get a reaction started

Question 5

Catalysts ________ the activation energy of a ____________

Answer 5

Catalysts LOWER the activation energy of a CHEMICAL REACTION

Question 6

Polar

Answer 6

A molecule which the charges are unevenly distributed

Question 7

Hydrogen bonding allows water to…

Answer 7

Dissolve many substances and expand when frozen

Question 8

Cohesion

Answer 8

Attraction between molecules of the same substance (which is why water beads up on some surfaces)

Question 9

Adhesion

Answer 9

The attraction between molecules of different substances

Question 10

Solution

Answer 10

When ions become evenly dispersed in water

Question 11

Solute

Answer 11

Substance being dissolved

Question 12

Solvent

Answer 12

The substance the solute dissolves in

Question 13

What macromolecules are the bodies main source of energy?

Answer 13

Carbohydrates - they break down sugars and supply immediate energy for cell activity.

Question 14

What macromolecules store energy well?

Answer 14

Lipids