Chapter 2: Molecules Of Cell Life

Question 0

What is an atom that carries a charge because it has an unequal number of protons and electrons

Answer 0

Ions

Question 1

What’s an atom with an unpaired electron?

Answer 1

Free radical

Question 2

Name three steroid hormones

Answer 2

Glucocorticoids
Mineralocorticoids
sex hormones
Androgen estrogen progesterone

Question 3

What are carbohydrates and what are they used for name one important one

Answer 3

They are simple sugars put together to make carbohydrates. Cells use carbohydrates for energy or as structural materials and an important carbohydrate is glucose

Question 4

The total number of protons and neutrons in the nucleus

Answer 4

Mass number

Question 5

What is an isotope with an unstable nucleus?

Answer 5

Radioisotope

Question 6

What happens in radioactive Decay ?

Answer 6

A nucleus breaks down, it emits radiation and subatomic particles energy or both

Question 7

What gives water the special properties that make life possible?

Answer 7

Hydrogen bonding
Water is a great solvent
What are stabilizes temperature and has cohesion

Question 8

Name the four monomers

Answer 8

Simple sugars
Fatty acids
amino acids
nucleotides

Question 9

Molecules of some substances resist separating from one another, and the resistance gives rise to a property called?

Answer 9

Cohesion

Question 10

What is a way to measure the energy of molecular motion?

Answer 10

Temperature

Question 11

? Refers to the amount of a particular solute that is dissolved in a given volume of fluid

Answer 11

Concentration

Question 12

? Is involved in protein synthesis and expression of genes

Answer 12

RNA

Question 13

What is the shape and function of DNA?

Answer 13

Double helix and the transmission of hereditary information.

Question 14

What are improperly folded proteins that can cause infectious diseases?

Answer 14

Prions

Question 15

Extreme temperatures, concentrations of salt, extremes in pH, detergent are what?

Answer 15

Conditions that can change protein shape ( denature the protein)

Question 16

What are the structural foundations of all cell membranes?

Answer 16

Phospholipid bilayers

Question 17

Wax molecules packed together tightly, resulting in a what?

Answer 17

Water repellent surface

Question 18

What are in all eukaryotic cell membranes?

Answer 18

Steroids

Question 19

What are lipids used for?

Answer 19

Energy storage, signaling, structural components

Question 20

What do fatty acid structures have?

Answer 20

A hydrophilic head and a hydrophobic tail

Question 21

In a saturated fatty acid one Carbon Atom tail has a double head, true or false?

Answer 21

False

Question 22

What is the number of protons in the nucleus?

Answer 22

Atomic number

Question 23

Elements are?

Answer 23

Pure substances with the same atomic number.

Question 24

What is an element with different number of protons and neutrons?

Answer 24

Isotope

Question 25

Enzyme is an organic molecule that makes reactions proceed slower than they would on their own. True or false?

Answer 25

False

Question 26

Activities by which cells acquire and use energy as they make and break down organic compounds is known as what?

Answer 26

Metabolism

Question 27

What is the attraction between a covalently bonded hydrogen Atom and another atom taking part in a separate polar covalent bond?

Answer 27

Hydrogen bond

Question 28

Hydrophobic means water loving. True or false?

Answer 28

False

Question 29

Bases except hydrogen ions true or false?

Answer 29

True

Question 30

What is a buffer?

Answer 30

A buffer is a set of chemicals that can keep the pH of solution stable by alternately donating and excepting ions that contribute to pH.

Question 31

What is spontaneous generation?

Answer 31

Spontaneous generation is life that has generated from nonliving matter.