BIO 100 Lab Test #1 UPDATED Exam
Questions and CORRECT Answers
What is the smallest unit of life? - CORRECT ANSWER - Cell
To which kingdom do single celled organisms with considerable internal complexity belong? -
CORRECT ANSWER - Prokaryote
What is the difference between prokaryotes and eukaryotes? - CORRECT ANSWER -
Eukaryotes contain a nucleus, and have more than one chromosome, while prokaryotes have
only one chromosome
List the four steps in the scientific method - CORRECT ANSWER - Observe, formulate
hypothesis, test hypothesis, interpret
Formulate a hypothesis for determining the beneficial effect of a nutritional substance. -
CORRECT ANSWER - People who take vitamins daily will have a more balanced diet
than those who don't.
Define dependent and independent variable. - CORRECT ANSWER - Dependent variable
is output or effect. Independent variable is input, stands alone, not changed. Independent variable
causes a change in the dependent variable.
List three criteria for judging the reliability of a scientific report. - CORRECT ANSWER -
- logical
-imperical
-observational
List the four major groups of macromolecules and their basic structural units. - CORRECT
ANSWER - -Carbohydrates (monomers called monosaccharides)
-Lipids (Fats, not polymers, glycerol and fatty acids)
, -Proteins (polymers composed of amino acid monomers)
-Nucleic Acids (polymers built form monomers called nucleotides. DNA and RNA)
What is the principal function of carbohydrates? - CORRECT ANSWER - They provide
the major energy source for living things.
Name three cellular structures. - CORRECT ANSWER - -Cytoplasm
-Nucleus
-Mitochondria
List the three domains and five kingdoms of life. - CORRECT ANSWER - Domain
Archaea, Domain Bacteria, Domain Eukarya, Kingdom Protista, Kingdom Fungi, Kingdom
Plantae, Kingdom Animalae, Kingdom Monera
What effect does boiling temperatures have on the rate of enzymatic reactions? - CORRECT
ANSWER - Boiling temperatures denature the enzyme and stop the reaction
How many calories in an ounce of butter (assuming 30 grams/oz)? - CORRECT
ANSWER - 200 calories per ounce
What two things could you measure to determine the rate of an enzymatic reaction? - CORRECT
ANSWER - You could measure the rate of disappearance for the reactant, or the rate of
appearance for the final product.
What effect does the addition of antacid have on the pH of vinegar? - CORRECT
ANSWER - Vinegar becomes more basic with the addition of an antacid. (Vinegar has a
ph of 3, after the antacid is added it has a ph of 5
How does an acid pH affect the reaction rate of amylase? - CORRECT ANSWER - An
acidic ph will cause amylase to lose it's activity if the amylase is not meant for that environment.
Amylase is only effective it is at the same ph as the substance it is trying to break down.
Questions and CORRECT Answers
What is the smallest unit of life? - CORRECT ANSWER - Cell
To which kingdom do single celled organisms with considerable internal complexity belong? -
CORRECT ANSWER - Prokaryote
What is the difference between prokaryotes and eukaryotes? - CORRECT ANSWER -
Eukaryotes contain a nucleus, and have more than one chromosome, while prokaryotes have
only one chromosome
List the four steps in the scientific method - CORRECT ANSWER - Observe, formulate
hypothesis, test hypothesis, interpret
Formulate a hypothesis for determining the beneficial effect of a nutritional substance. -
CORRECT ANSWER - People who take vitamins daily will have a more balanced diet
than those who don't.
Define dependent and independent variable. - CORRECT ANSWER - Dependent variable
is output or effect. Independent variable is input, stands alone, not changed. Independent variable
causes a change in the dependent variable.
List three criteria for judging the reliability of a scientific report. - CORRECT ANSWER -
- logical
-imperical
-observational
List the four major groups of macromolecules and their basic structural units. - CORRECT
ANSWER - -Carbohydrates (monomers called monosaccharides)
-Lipids (Fats, not polymers, glycerol and fatty acids)
, -Proteins (polymers composed of amino acid monomers)
-Nucleic Acids (polymers built form monomers called nucleotides. DNA and RNA)
What is the principal function of carbohydrates? - CORRECT ANSWER - They provide
the major energy source for living things.
Name three cellular structures. - CORRECT ANSWER - -Cytoplasm
-Nucleus
-Mitochondria
List the three domains and five kingdoms of life. - CORRECT ANSWER - Domain
Archaea, Domain Bacteria, Domain Eukarya, Kingdom Protista, Kingdom Fungi, Kingdom
Plantae, Kingdom Animalae, Kingdom Monera
What effect does boiling temperatures have on the rate of enzymatic reactions? - CORRECT
ANSWER - Boiling temperatures denature the enzyme and stop the reaction
How many calories in an ounce of butter (assuming 30 grams/oz)? - CORRECT
ANSWER - 200 calories per ounce
What two things could you measure to determine the rate of an enzymatic reaction? - CORRECT
ANSWER - You could measure the rate of disappearance for the reactant, or the rate of
appearance for the final product.
What effect does the addition of antacid have on the pH of vinegar? - CORRECT
ANSWER - Vinegar becomes more basic with the addition of an antacid. (Vinegar has a
ph of 3, after the antacid is added it has a ph of 5
How does an acid pH affect the reaction rate of amylase? - CORRECT ANSWER - An
acidic ph will cause amylase to lose it's activity if the amylase is not meant for that environment.
Amylase is only effective it is at the same ph as the substance it is trying to break down.
