Chemistry of life

Question 1

What are the main types of chemical bonds?

Answer 1

Ionic and covalent

Question 2

The chemical bond in which electrons are shared between atoms is called ??

Answer 2

Covalent bond

Question 3

Which chemical bond is formed when one or more electrons are transferred from one atom to another?

Answer 3

Ionic bond

Question 4

What are four groups of organic compounds found in living things?

Answer 4

Carbohydrates, lipids, nucleus acids, and proteins

Question 5

What do living things use as their main source of energy?

Answer 5

Carbohydrates

Question 6

What do plants and animals use carbohydrates for?

Answer 6

Structural purposes

Question 7

What are two examples of carbs that are used as sources of energy?

Answer 7

Starches and sugar

Question 8

What forms when sugars join together in a long chain?

Answer 8

Starches

Question 9

What are a large and varied group of biological molecules that are generally not soluble in water?

Answer 9

Lipids

Question 10

What two atoms are lipids mostly made from?

Answer 10

Carbon and hydrogen atoms

Question 11

What are the common categories of lipids?

Answer 11

Fats, oils, and waxes

Question 12

What can lipids be used to store?

Answer 12

Energy

Question 13

Some lipids are important parts of what two things?

Answer 13

Biological membranes and waterproof coverings

Question 14

Steroids are what?

Answer 14

Lipids

Question 15

What do many steroids serve as?

Answer 15

Chemical messengers

Question 16

What store and transmit genetic information?

Answer 16

Nucleic acids

Question 17

What are the monomers that make up nucleus acids?

Answer 17

Nucleotides

Question 18

What does each nucleotide have?

Answer 18

5-carbon sugar, phosphate group, and nitrogenous base

Question 19

Chemical reactions always involve what?

Answer 19

Breaking of bonds in reactants and formation of new bonds in products

Question 20

Chemical reactions that release energy often occur ??

Answer 20

Spontaneously

Question 21

Chemical reactions that absorb energy will occur only with a ??

Answer 21

Source of energy

Question 22

What speed up chemical reactions that take place in cells?

Answer 22

Enzymes

Question 23

What are the subatomic particles that make up atoms?

Answer 23

Protons, neutrons, and electrons