In order for cells to function properly, the enzymes that they contain must also function properly. What can be inferred using the above information?

cells do not function well at pH’s that are too high or too low

cells function equally as well at all pH’s

cells function best at high pH’s

cells function best at low pH’s

Which property of water is most responsible for plants being able to transport water from their roots to their leaves?

the attraction between molecules

a capacity to dissolve many substances

the ability to form a low-density crystalline structure when frozen

a capacity to absorb large amounts of energy as temperature increases

Which process best describes the assembly of proteins from amino acids?

Monomers are linked to form a polymer.

Atoms are linked to form a compound.

Atoms are added to a monomer until it becomes a polymer.

Molecules are added to a compound until it becomes a monomer.

Which statement best compares a carbohydrate and a nucleic acid?

The bonds in a carbohydrate store energy, and the sequence of nucleotides in a nucleic acid stores genetic information.

The sequence of monomers in a carbohydrate stores genetic information, and the bonds in a nucleic acid store energy.

A carbohydrate has a unique structure to assist diffusion across a plasma membrane, and a nucleic acid has a unique structure to assist chemical reactions.

A carbohydrate has a unique structure to assist chemical reactions, and a nucleic acid has a unique structure to assist diffusion across a plasma membrane.

Trees are typically able to transport water from their roots to their stems and leaves. Which statement describes the property of water that most supports the transportation of water to all parts of a tree?

Water has strong attractions to itself and many other molecules.

Water forms a crystalline structure when it freezes.

Water dissolves fewer substances than any other liquid.

Water can absorb large amounts of energy with minimal temperature changes.

Microbes in the digestive system break down food, which allows nutrients to be absorbed by the body’s cells. How will these body cells most likely be affected if an individual suffers from a high fever?

The body cells will bring in fewer nutrient molecules because the transport proteins lose their proper shape due to the high temperature.

The body cells will swell because an increase in temperature promotes greater water absorption.

The body cells will stop absorbing nutrients because the heat melts the lipid bilayer of the plasma membrane.

The body cells will shrivel because the heat eliminates the chemical gradients on either side of the plasma membrane.

Plants are dependent on water. In most plants, water is absorbed by the roots and then moves up the stem of the plant and into the leaves by capillary action. Which properties of water are most responsible for the capillary action in plants?

polarity and high specific heat

high specific heat and cohesion

A.2 Chemistry of Life

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MULTIPLE CHOICE QUESTION

30 sec • 1 pt

All living organisms contain carbon atoms. Which of the following is an important characteristic of carbon?

Carbon atoms are highly reactive and form unstable bonds with any available atom.

Carbon atoms can bond with any other atom, but they cannot form bonds with other carbon atoms.

Carbon atoms are very stable and do not easily form bonds with other atoms

Carbon atoms can bond with many other kinds of atoms to form very stable molecules

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Identify the types of bonds that would be shown in the formation of a water molecule (A) and the attractive force between two different water molecules (B).

A – ionic bond; B – covalent bond

A – covalent bond; B – ionic bond

A – covalent bond; B – hydrogen bond

A – hydrogen bond; B – covalent

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

How does the structure of this enzyme help with its function?

since the enzyme's shape matches the substrate's shape, it catalyzes only reverse reactions

the enzyme's shape complements the substrate's shape, so it only catalyzes specific reactions

the enzyme's active site is amorphous and can change its shape to fit any substrate

since the enzyme is larger than the substrate, catalytic reactions can occur within the enzyme itself

MULTIPLE SELECT QUESTION

30 sec • 1 pt

Match the IMAGE to the correct term(s) provided. Mark all that apply.

Protein monomer

Amino Acid

Lipid

Carbohydrate monomer

Nucleic Acid monomer

MULTIPLE SELECT QUESTION

30 sec • 1 pt

Match the IMAGE to the correct term(s) provided. Mark all that apply.

Carbohydrate monomer

Glucose

Lipid

Protein monomer

Nucleic Acid monomer

MULTIPLE SELECT QUESTION

30 sec • 1 pt

Match the IMAGE to the correct term(s) provided. Mark all that apply.

Lipid

Phospholipid

Fatty Acid

Carbohydrate monomer

Protein monomer

MULTIPLE SELECT QUESTION

30 sec • 1 pt

Match the IMAGE to the correct term(s) provided. Mark all that apply.

Nucleic Acid monomer

Nucleotide

Lipid

Carbohydrate monomer

Protein monomer

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A.2 Chemistry of Life

All living organisms contain carbon atoms. Which of the following is an important characteristic of carbon?

Identify the types of bonds that would be shown in the formation of a water molecule (A) and the attractive force between two different water molecules (B).

How does the structure of this enzyme help with its function?

Match the IMAGE to the correct term(s) provided. Mark all that apply.

Match the IMAGE to the correct term(s) provided. Mark all that apply.

Match the IMAGE to the correct term(s) provided. Mark all that apply.

Match the IMAGE to the correct term(s) provided. Mark all that apply.

Which type of macromolecule is the main source of DAILY ENERGY for organisms?

Which type of macromolecule's functions include STRUCTURE, IMMUNITY, TRANSPORT, and ENZYMES?

Which type of macromolecule forms the primary structure of the CELL MEMBRANE, provides INSULATION and CUSHIONING, and acts as an ENERGY RESERVE?

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