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The Study of Life
Chemical Foundation of Life
Biological Macromolecules
Random
100

The first forms of life on Earth were ________.

  1. plants
  2. microorganisms
  3. birds
  4. dinosaurs

b. microorganisms

100


Atoms that vary in the number of neutrons found in their nuclei are called ________.

  1. ions
  2. neutrons
  3. neutral atoms
  4. isotopes

d. isotopes

100

Dehydration synthesis leads to formation of

  1. monomers
  2. polymers
  3. water and polymers
  4. none of the above

c. water and polymers 

100

Look at Image A

Which is missing?

Ecosystem: living organisms and the environment which they live in

200

A suggested and testable explanation for an event is called a ________.

  1. hypothesis
  2. variable
  3. theory
  4. control

a. hypothesis

200

Which type of bond represents a weak chemical bond?

  1. hydrogen bond
  2. atomic bond
  3. covalent bond
  4. nonpolar covalent bond

a. hydrogen bond 

200


During the breakdown of polymers, which of the following reactions takes place?

  1. hydrolysis
  2. dehydration
  3. condensation
  4. covalent bond

a. hydrolysis

200

Define Buffer

substance that resists a change in pH by absorbing or releasing hydrogen or hydroxide ions

300

Which of the following sciences is not considered a natural science?

  1. biology
  2. astronomy
  3. physics
  4. computer science

d. computer science

300


We call a molecule that binds up excess hydrogen ions in a solution a(n) ________.

  1. acid
  2. isotope
  3. base
  4. donator

c. base

300

An example of a monosaccharide is ________.

  1. fructose
  2. glucose
  3. galactose
  4. all of the above

d. all of the above

300

Fill in the blank 

The _______________ between water molecules cause the water to have a high heat capacity, meaning it takes considerable added heat to raise its temperature. As

hydrogen bonds

400

Where in a phylogenetic tree would you expect to find the organism that had evolved most recently?

  1. at the base
  2. within the branches
  3. at the nodes
  4. at the branch tips

d. at the branch tips

400

Which of the following is not a functional group that can bond with carbon?

  1. sodium
  2. hydroxyl
  3. phosphate
  4. carbonyl

a. sodium

400

Plant cell walls contain which of the following in abundance?

  1. starch
  2. cellulose
  3. glycogen
  4. lactose

b. cellulose

400

What are the four major classes of biological macromolecules?

Proteins, carbohydrates, nucleic acids, and lipids

500

Which of the following sequences represents the hierarchy of biological organization from the most inclusive to the least complex level?

  1. organelle, tissue, biosphere, ecosystem, population
  2. organ, organism, tissue, organelle, molecule
  3. organism, community, biosphere, molecule, tissue, organ
  4. biosphere, ecosystem, community, population, organism

d. biosphere, ecosystem, community, population, organism

500

Which of the following statements is true?

  1. Acids and bases cannot mix together.
  2. Acids and bases will neutralize each other.
  3. Acids, but not bases, can change the pH of a solution.
  4. Acids donate hydroxide ions (OH–); bases donate hydrogen ions (H+).

b. acids and bases will neutralize each other

500

Phospholipids are important components of ________.

  1. the plasma membrane of cells
  2. the ring structure of steroids
  3. the waxy covering on leaves
  4. the double bond in hydrocarbon chains

a. the plasma membrane of cells

500


What are the structural differences between RNA and DNA?

DNA has a double-helix structure. The sugar and the phosphate are on the outside of the helix and the nitrogenous bases are in the interior.

RNA is usually single-stranded and is made of ribonucleotides that are linked by phosphodiester linkages.