MCB 2026 Dr. Dennis Quizzes 1 & 2 (Exam 1) UPDATED ACTUAL
Questions and CORRECT Answers
Question: The hypothesis that cowpox could provide protection against smallpox was tested by ________
and provided the basis for the first vaccine.
Correct Answer: Edward Jenner
Question: Fungal infections are studied by
Correct Answer: mycologists
Question: Work by ________ laid the foundations of immunology with the development of vaccines.
Correct Answer: Jenner and Pasteur
Question: Microorganisms characterized by the absence of a nucleus are called
Correct Answer: prokaryotes.
Question: Which of the following is an incorrect pairing?
Correct Answer: Protozoa; multicellular They are unicellular
Question: Proof that a microbe could cause disease was provided by
Correct Answer: Koch.
Question: A dehydration synthesis reaction between glucose (C6H12O6) and fructose (C6H12O6)
produces a molecule of sucrose (C12H22O11). Why don't the two individual molecular formulae add up to
the same number of atoms in the sucrose product?
Correct Answer: In a dehydration reaction, a water molecule (H2O) is removed from the final molecule
formed.
Question: What is the type of bond holding hydrogen and oxygen atoms together in a single H2O
molecule?
Correct Answer: covalent bond
Question: Which of the following statements regarding protein structure is FALSE?
Correct Answer: Tertiary structures are formed only from covalent bonds.
Question: Table 2.1 O; C; H Using the information in Table 2.1, calculate the molecular weight of ethanol,
C2H5OH.
Correct Answer: 46
Question: Which molecule is composed of a chain of amino acids?
Correct Answer: protein
Question: An E. coli culture that has been growing at 37°C is moved to 25°C. Which of the following
changes must be made in its plasma membrane to help it cope with the decrease in temperature?
Correct Answer: The number of unsaturated chains must increase.
Question: Which type of molecule is composed of (CH2O) units?
Correct Answer: carbohydrate
Questions and CORRECT Answers
Question: The hypothesis that cowpox could provide protection against smallpox was tested by ________
and provided the basis for the first vaccine.
Correct Answer: Edward Jenner
Question: Fungal infections are studied by
Correct Answer: mycologists
Question: Work by ________ laid the foundations of immunology with the development of vaccines.
Correct Answer: Jenner and Pasteur
Question: Microorganisms characterized by the absence of a nucleus are called
Correct Answer: prokaryotes.
Question: Which of the following is an incorrect pairing?
Correct Answer: Protozoa; multicellular They are unicellular
Question: Proof that a microbe could cause disease was provided by
Correct Answer: Koch.
Question: A dehydration synthesis reaction between glucose (C6H12O6) and fructose (C6H12O6)
produces a molecule of sucrose (C12H22O11). Why don't the two individual molecular formulae add up to
the same number of atoms in the sucrose product?
Correct Answer: In a dehydration reaction, a water molecule (H2O) is removed from the final molecule
formed.
Question: What is the type of bond holding hydrogen and oxygen atoms together in a single H2O
molecule?
Correct Answer: covalent bond
Question: Which of the following statements regarding protein structure is FALSE?
Correct Answer: Tertiary structures are formed only from covalent bonds.
Question: Table 2.1 O; C; H Using the information in Table 2.1, calculate the molecular weight of ethanol,
C2H5OH.
Correct Answer: 46
Question: Which molecule is composed of a chain of amino acids?
Correct Answer: protein
Question: An E. coli culture that has been growing at 37°C is moved to 25°C. Which of the following
changes must be made in its plasma membrane to help it cope with the decrease in temperature?
Correct Answer: The number of unsaturated chains must increase.
Question: Which type of molecule is composed of (CH2O) units?
Correct Answer: carbohydrate
