Download Midterm Exam: 2000-2001

Biology I: Midterm Practice Exam
1.
When a person does strenuous exercise, small blood vessels near the surface of the skin increase in diameter. The change allows
the body to be cooled. This statement best illustrates
A. Synthesis
C. Excretion
B. Homeostasis
D. Locomotion
2.
The word theory used in a scientific sense means
A. A guess made with very little to support it
B. An absolute scientific certainty
C. A highly tested, generally accepted principle
D. None of the above
Which of the following is an example of a base?
A. Ammonia
B. Orange juice
C. Stomach secretions
D. Water
3.
4.
Due to maximizing the number of _______ bonds, solid water is actually less dense then liquid water.
A. Metallic
C. Ionic
B. Hydrogen
D. Covalent
5.
Which of the following characteristics of water is NOT due to hydrogen bonding
A. Adhesion
C. Cohesion
B. Capillarity
D. All are due to hydrogen bonding
6.
The warning on the cleaner is as follows: “If swallowed, drink a lot of water and then drink milk of magnesia, eggs or milk” Why
would it say this?
A. The cleaner must be an acid and the milk must be a base, it would neutralize it.
B. The cleaner must be an base and the milk must be acid, it would neutralize it
C. Eggs will make you vomit up all the poison
D. None of the above
7.
Because carbon has four electrons in its outer most energy level
A. It can from bonds with carbon atoms only
B. These atoms are naturally chemically stable
C. It can react with up to four other atoms to form covalent bonds
D. It cannot react with anything other than organic molecules
8.
Genetic information/DNA is carried by
A. Lipids
B. Proteins
C. Nucleic acids
D. Carbohydrates
Enzymes speed up reactions by
A. Lowering activation energy
B. Increasing the reaction temperature
C. Decreasing the amount of reactant collision
D. All of the above
9.
10. Amino acids are monomers of
A. Disaccharides
B. Nucleotides
C. Steroids
D. Proteins
11. Which substance is a lipid?
A. Sugar
B. Oil
C. Enzyme
D. DNA
12. Which of the following statements is false
A. A wax is a lipid
B. Saturated fast are solid at room temperature
C. Unsaturated fats are liquid at room temperature
D. Starch is a lipid
13. Living organisms can be classified as prokaryotes or eukaryotes. Which two structures are common to both prokaryotic and
eukaryotic cells?
A. Cell wall and nucleus
C. Cell wall and chloroplast
B. Plasma membrane and cytoplasm
D. Plasma membrane and nucleus
14. The function of the vacuole in the cell is to
A. Make proteins
B. Produce energy
C. Store water
D. Control activities
15. A cell that was long and skinny would be good at
A. Covering the body’s surface
B. Moving around
C. Detecting light
D. Receiving & transmitting nerve signals
16. Which cell part is found in both prokaryotic and eukaryotic cells
A. Cell walls
B. Mitochondria
C. DNA
D. Endoplasmic Reticulum
17. Organisms that rely on the temperature of their surroundings to maintain their body temperature are known as
A. Endothermic
C. Isothermic
B. Exothermic
D. Hypothermic
18. Why does pouring salt on a slug kill it
A. The salt goes into the slug
B. It creates a hypotonic solution
C. It creates a hypertonic solution
D. It creates an isotonic solution
19. The structure most responsible for maintaining cell homeostasis is the
A. Cytoplasm
B. Mitochondria
C. Vacuole
D. Plasma membrane
20. The dispersal of ammonia fumes throughout a room is an example of
A. Diffusion
B. Osmosis
C. Active transport
D. Phagocytosis
21. Which of the following does not expend energy?
A. Diffusion
B. Endocytosis
C. Active transport
D. Sodium-Potassium pump
22. Ridding the cell of material by discharging it from sacs on the cell surface is called
A. Pinocytosis
C. Exocytosis
B. Phagocytosis
D. Endocytosis
23. When oxygen is unavailable, muscle tissue converts glucose into
A. Alcohol
B. Carbon dioxide
C. Enzymes
D. Lactic acid
24. The ultimate goal of photosynthesis is to
A. Make ATP from carbon dioxide
B. Construct sugars
C. Covert ADP to ATP
D. Use enzymes to speed up chemical reactions
25. Using a microscope, a student observes a small, green organelle in a plant cell. Which energy transformation most likely occurs
first within the observed organelle?
A. Light to chemical
C. Heat to electrical
B. ATP to light
D. Chemical to chemical
26. A protein in the cell membrane changed its shape to move sodium and potassium ions against their concentration gradients.
Which molecule was most likely used by the protein as an energy source?
A. ADP
C. Catalase
B. ATP
D. Amylase
27. If a cell has 8 chromosomes before division, how many chromosomes will the new cells have after MITOSIS?
A. 16
C. 4
B. 8
D. 32
28. Almost all human cells contain 46 chromosomes. These 46 chromosomes are
A. Composed of 23 pairs
B. The diploid number of chromosomes in our cells
C. Copies of chromosomes that came from both parents (½ from mom and ½ from)
D. All of the above are true
29. An organism has 12 chromosomes in each body cell. How many chromosomes will be in the organism’s sex
cells?
A. 3
C. 12
B. 6
D. 24
30. A diploid cell is one that
A. Has homolgous chromosomes
B. Is every cell but sperm and egg
C. Has chromosomes found in pairs
D. All of the above
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