WVU bio 115 exam 1

True or False? A theory is subject to being amended or changed.

True

Bipasha is studying a new drug, Calcigro, that is suspected to improve bone density. The drug has made it through animal testing and into human trials. Two groups of females have been matched for age, race and health status. Group A is given a pill containing starch and 1000 mg of Calcigro while Group B is given a pill containing starch only. Both groups are following a diet regimen with an intake of 1000 mg of calcium daily.

What is the independent variable?

contents of the pill

Bipasha is studying a new drug, Calcigro, that is suspected to improve bone density. The drug has made it through animal testing and into human trials. Two groups of females have been matched for age, race and health status. Group A is given a pill containing starch and 1000 mg of Calcigro while Group B is given a pill containing starch only. Both groups are following a diet regimen with an intake of 1000 mg of calcium daily.

What is the experimental group in this experiment?

Group A

A positive control in an experiment should provide a result similar to the experimental group when...

the result would support the hypothesis

Two atoms are bonded together when a valence electron is donated from one atom and received by the second. The resulting charge of the two atoms leads to their attraction to one another.

What type of bond is described above?

Ionic

Two atoms are bonded together when valence electrons are shared between the two. The electrons spend an equal amount of time around the nucleus of each atom.

What type of bond is described above?

Polar Covalent

Which of the following statements about water is true?

Water will dissolve molecules that are either polar or that have a charge.

Oil does not dissolve in water. Based on this fact, you know that the majority of the bonds in the molecules that make up the oil must be:

Non-polar covalent

True or False? The type of chemical reaction responsible for linking monomers into polymers is known as a condensation (or dehydration) reaction.

True

Match the following list of polymers with the bonds that hold together their monomers:

Nucleic Acids

Phosphodiester bonds

Proteins

Peptide bonds

Lipids

Ester bonds

Polysaccharides

Glycosidic bonds

Match the following list of polymers with the monomers from which they are created:

Polypeptides

amino acids

Lipids

Glycerol + 3Fatty Acids

Nucleic Acids

Nucleotides

Polysaccharides

Monosaccharides

types of bonds/interactions/forces are holding together a protein in its tertiary (3o) structure?

Covalent Bonds, Ionic Bonds , Hydrophobic forces, Hydrogen bonds

types of bonds/interactions/forces are holding together a protein in its secondary (2o) structure?

Hydrogen, Covalent

types of bonds/interactions/forces are holding together a protein in its primary (1o) structure?

Covalent Bonds

A strand of DNA is 30% A (Adenine). What percentage of it is made up of T (thymine)?

30%

A strand of DNA is 12% C (Cytosine). What percentage of it is made up of T (thymine)?

38%

The type of bond that links two nucleotides between two different strands of DNA is known as a _________ bond.

Hydrogen

The type of bond that links two nucleotides along a single strand of DNA is known as a _________ bond.

Phosphodiester

Which polysaccharide has the main function of being a structural component of fungi?

Chitin

Which polysaccharide has the main function of being a structural component of plants?

Cellulose

What type of chemical reactions are responsible for linking monomers together build polymers?

condensation

What types of bonds are found between the monomers of proteins?

Peptide bonds

What are the monomers of proteins?

Amino Acids

Enzymes

Act as catalysts for chemical reactions and lowers the activation energy