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INTRODUCTION-MACROMOLECULES

Organs are composed of tissues, which are composed of cells. This is an example of which characteristics of life?

Living things have levels of hierarchical organization.

The smallest unit that has all of the characteristics of life is the:

Cell.

A fossil was once a living organism but its tissues have now been replaced by minerals and it no longer exhibits most properties of life, except for:

Organization.

Outside, the non-living world is unorganized and chaotic while inside the cell or organism there is a relatively constant environment; maintaining this environment is a process of:

Homeostasis.

A kernel of corn contains an embryo plant that is capable of becoming a complex plant with roots, stalks, leaves, and ears of corn. This potential reflects which property of life?

Growth and development.

Which level of biological organization is composed of tissues?

Organ.

Which sequence correctly lists the different levels of biological organization?

Cells-Tissues-Organs-Organ System-Organism

Which of the following is the correct order of levels of organization from small to large?

Cell-Tissue-Organ-Organ System-Population-Community-Ecosystem

All members of one species within a particular area form a:

Population.

All populations in one natural setting plus their physical environment constitutes a(n):

Ecosystem.

When researchers test a new human cancer drug using mice, the mice used constitute the:

Model.

Which of the following is not one of the six basic elements of living organisms?

Chlorine.

The atoms contain:

Protons, neutrons, and electrons.

To measure the activity of the human brain, a RADIOACTIVE sugar is injected in the carotid artery and is utilized by those cells that are most active. This shows up on a PET scan and demonstrates the detection of:

Isotopes.

Which of the following molecules is NOT a compound?

Oxygen or O2

You can hold a water droplet between two fingertips held slightly apart. This is an example of what property?

Cohesion of water molecules from hydrogen bonding.

The water strider is an insect that skates across the water without sinking. The tips of its feet should be coated with molecules that are:

Hydrophobic.

Since pure water is neutral, it contains:

Equal number of hydrogen and hydroxide ions.

If the pH of the saliva is slightly basic. Which of the following would therefore be an expected pH for Saliva?

7.4

The study of all living things is called:

Biology.

The basic unit of matter is called:

Atom.

The cells keep a constant pH with the use of:

Buffers.

The ability to do work is a good indication of:

energy.

A solution with a pH of 5 would be considered:

Acidic.

_____allows water molecules to stick together and form droplets.

Cohesion.

The most common elements in life are:

O, C, H, N

Organic macromolecules always:

Contain carbon.

Which is NOT a correct association of organic molecules?

Fatty acids full of hydrogen's are unsaturated.

A genetic mutation can cause a change in the SEQUENCE of the 20 amino acids used to build proteins. Such a change is a change to the protein's structure:

Primary which will alter 2nd and 3rd

Glycogen and cellulose are:

Polysaccharides used to store glucose/energy.

Lactose and glucose are classified as:

Carbohydrate.

All carbohydrate molecules have:

C, H, O

____ is found in muscles and accounts for energy strength:

Glycogen.

A fat molecule formation requires both glycerol and:

Fatty acids.

Nucleic acids are polymers of:

Nucleotides.

Which association is NOT correct?

Carbohydrate-Enzymes.

Antibodies and enzymes are organic compounds classified as:

Proteins.

The ____ structure of a protein consists of the SEQUENCE of amino acids joined together by polypeptide bonds.

Primary.

If two amino acids are joined together, the resulting molecule is a(n):

Peptide.

The proposed cause of mad-cow disease and kuru in cannibals from New Guinea is a change in a brain protein. Disease victims appear to have a normal protein that should contain primarily coiled alpha helix changed conformation into a protein mainly made of pleated beta sheets. This would constitute a change in the:

Secondary structure.

Which of these combinations would be found in a nucleotide?

Base-Sugar-Phosphate group.

The backbone (sides of the ladder) of a nucleic acid is made by the repetition of:

Sugar-Phosphate

The final shape of a protein is very important to its function. When proteins undergo an irreversible change in shape called _____ they _____ perform their usual functions.

Denaturation/can.

Proteins are made from amino-acids which are connected together by:

Peptide bonds.

The main functions of carbohydrates is/are:

Structure and energy.

Molecules such as cellulose formed from long chains of individual sugar molecules are called:

Polysaccharides.

DNA is considered this type of compound (Lipid, Protein, Carbohydrate, or No Correct Response):

No correct response.

The shape of a protein affects what?

Function.

All FOUR DNA nucleotides differ in the:

Base.

Lipids are used for:

Energy storage.

The main function/s of carbohydrates is/are:

Structure and energy.

Molecules such as glycogen formed from long chains of individual sugar molecules, are called:

Polysaccharides.

The unique nucleotide present in the RNA but not in the DNA is:

U

Which of the following is not a macromolecule used to build cells?

Crystals.

A complex carbohydrate from the following list is______(Sucrose, Fructose, Glucose, Glycogen).

Glycogen

Fats are found solid at room temperature depending on the amount of:

Hydrogens.

Hemoglobin and antibodies are samples of:

Protein.

Which of the following have nitrogenous bases correctly paired in DNA?

Adenine-Thymine; Guanine-Cytosine

A nucleotide contains:

A sugar, a phosphate, and a nitrogen base.

Which of the following is NOT true about DNA? (Has a double helix, Bases held together by hydrogen bonds, Bases are complementary to each other, Has a deoxyribose sugar, Contains adenine, guanine, cytosine, and uracil.

Contains adenine, guanine, cytosine, and uracil.

Similar to most liquids, water becomes most dense when it becomes solid (ice). True or False?

False.

DNA and RNA heredity molecules code for the sequence of amino acids but not sugars or lipids. True or False?

True.

Cholesterol is an example of a saturated fatty acid. True or False?

False.

Hemoglobin is a complex protein having a primary, secondary, tertiary, and quaternary structure. True or False?

True.

When an egg is cooked on a stove, the albumin PROTEIN of the egg is said to be denatured. True or False?

True.

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