is the term for the amount of energy that needs to be added for a chemical reaction to start

is the term for the amount of energy in each reactant

helps the enzyme to increase the rate of the reaction

is the term for the amount of energy released by the reaction after it starts

What are the 4 types of carbon-based molecules in organisms?

nucleic acids, proteins, lipids, and carbohydrates

carbohydrates, lipids, fatty acids, and monomers

polymers, monomers, acids, bases

adhesion, cohesion, evaporative cooling, and high specific heat

Changes in the pH, temperature, enzyme concentration, and/or substrate concentration can negatively affect

the efficient function of an enzyme or catalyzed reaction

the activation energy of chemical reactions

the bond energy released by reactants in a reaction

the polarity of water used for evaporative cooling

Which of the following is NOT true of atoms?

They are composed of molecules.

They can combine with other atoms.

An atom becomes negatively charged by

losing a proton gaining a neutron

What determines the chemical properties of an atom?

Number of electrons in the outside shell

The number of protons in the nucleus

The number of protons in the outside shell

The number of electrons in the nucleus

Water is essential for life. Its special properties make water the single most important molecule in plant life. Which of the following properties of water enables it to move from the roots to the leaves of plants?

Water exhibits cohesive behavior

Water is able to moderate temperature

Why does water move from the roots to the leaves of plants?

Capillary action pulls the water molecules like a chain

Water's cohesion causes it to "pull" towards the leaves

A water strider can skate along the top of a pond because:

Hydrogen bonds result in water cohesion (surface tension)

Covalent bonds result in water cohesion

Water striders have adapted to take advantage of water cohesion

Why does ice stay at the top of oceans instead of sinking to the bottom?

Ice is less dense than liquid water

Ice is colder than liquid water

Ice is more dense than liquid water

Ice is warmer than liquid water

As water freezes, it expands and its density decreases.

As water freezes, air becomes trapped between the hydrogen bonds of water molecules.

As water freezes, it takes up more hydrogen from the atmosphere, causing it to have greater buoyancy (floating ability).

As water freezes, it takes up more oxygen from the atmosphere, causing it to have greater buoyancy.

Water is polar because:

The unequal sharing of electrons gives the water molecule a slight negative charge near its oxygen atom and a slight positive charge near its hydrogen atoms.

The molecule has two poles, at which it is colder than the other regions of the molecule.

The unequal sharing of electrons gives the water molecule a slight negative charge near its hydrogen atoms and a slight positive charge near its oxygen atom.

How can you tell the difference in the structure of carbohydrates and lipids?

Both have Carbon, Hydrogen, and Oxygen. Lipids have ring structures and Carbohydrates have line structures

Both have Carbon, Hydrogen, and Oxygen. Carbohydrates have ring structures and Lipids have line structures

Carbohydrates have more carbon than Lipids

Both have Carbon, Hydrogen, and Oxygen. Lipids additionally have Nitrogen

Some proteins catalyze biochemical reactions. If a genetic defect prevented a protein catalyst from being produced, which of the following do you predict would happen in the cell?

The reaction the protein catalyzes would proceed very slowly or not at all.

The cell would find a different type of protein to catalyze the reaction.

The reaction the protein catalyzes would only occur in some places in the cell.

The reverse reaction of the one the protein catalyzes would begin to proceed.

As food travels through the digestive system, it is exposed to a variety of pH levels. The stomach has a pH of 2 due to the presence of hydrochloric acid (HCl), and the small intestine has a pH ranging from 7 to 9. HCl converts pepsinogen into pepsin, an enzyme that digests proteins in the stomach. Which of the following most likely happens to pepsin as it enters the small intestine?

Its shape changes to engulf large proteins

Its activity increases to ingest more proteins

Acc. Biology Chemistry of Life (Chapter 2)

Authored by Michael Kussaim

Science

NGSS covered

Used 24+ times

Acc. Biology Chemistry of Life (Chapter 2)

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MULTIPLE CHOICE QUESTION

30 sec • 1 pt

When is an ionic bond formed?

when electrons are shared

when protons are shared

when oppositely charged atoms gain or lose electrons

when oppositely charged atoms gain or lose a proton

Tags

NGSS.MS-PS1-5

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What gives water so many important properties for life?

adhesion and cohesion

the amount of carbon in each molecule

energy released exothermically

hydrogen bonds

Tags

NGSS.MS-ESS2-4

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What makes a chemical reaction?

matter is conserved

breaking and forming of chemical bonds

when products form reactants

when you do a lab

Tags

NGSS.MS-PS1-5

NGSS.MS-PS1-2

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What are the smallest basic units of matter?

molecules

atoms

elements

7th graders

Tags

NGSS.MS-PS1-1

NGSS.MS-PS1-5

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Exothermic reactions

absorb more energy than they release

are cold

do not use bond energy for activation

release more energy than they absorb

Tags

NGSS.HS-PS1-4

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which of the following solutions has the highest Hydrogen ion concentration?

a solution with a pH of 1

a solution with a pH of 4

a solution with a pH of 7

a solution with a pH of 10

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

A catalyzed reaction

increases the products made

uses less activation energy to get started

has a slower reaction rate

uses more reactants throughout the reaction

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Acc. Biology Chemistry of Life (Chapter 2)

When is an ionic bond formed?

What gives water so many important properties for life?

What makes a chemical reaction?

What are the smallest basic units of matter?

Exothermic reactions

Which of the following solutions has the highest Hydrogen ion concentration?

A catalyzed reaction

Enzymes act on

Atoms that share electrons are

What are the reactants in this chemical equation?

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