BSC-108 Test 2 Questions Fully Solved.
1. What do all living organisms need to sustain life? - Answer energy
2. What is energy? - Answer the capacity to do work
3. What are the different types of energy? - Answer kinetic energy- energy of motion potential
energy- stored energy
4. What is a calorie? - Answer the amount of energy that can raise the temperature of 1 gram
of water by 1 degree Celsius
5. What is a Calorie? (there is a difference between this one and the one above.) - Answer a
kilocalorie (1,000 calories)
6. What is the conservation of energy principle? - Answer Energy can be changed from one
form to another, but it cannot be created or destroyed
7. What is entropy? - Answer a measure of disorder, or randomness, in a system; every time
energy is converted from one form to another, entropy increases
8. What is activation energy? - Answer the energy that activates the reactants in a chemical
reaction; triggers a chemical reaction to proceed
9. What is an enzyme and how do they work? - Answer an enzyme is a protein that speeds up
chemical reactions; enzymes can function over and over again; enzymes work by lowering the
activation energy of a chemical reaction
10. What factors affect how well enzymes work? - Answer specificity, presence of inhibitor,
temperature, pH
11. How does an enzyme inhibitor work? - Answer an enzyme inhibitor is a substrate imposter
that plugs up to the active site or binds at a remote site and changes the enzyme's shape
12. What is a receptor? - Answer a molecule most often found on the surface of a cell which
receives chemical signals originating externally from the cell
13. What is ATP and what is it used for? - Answer ATP consists of an organic molecule call
adenosine plus a tail of three phosphate groups; ATP is used to power cellular work
, 14. How do you get energy from ATP? - Answer ATP stores energy obtained from food and
releases it as needed at a later time
15. What is the difference between diffusion and osmosis? - Answer diffusion- the movement
of molecules spreading evenly into the available space osmosis- the diffusion of water across a
selectively permeable membrane
16. What is hyper, hypo and istonic? - Answer ...
hypertonic- - Answer more solute than equilibrium
hypotonic- - Answer less solute than equilibrium
isotonic- - Answer in equilibrium
17. What happens to red blood cells if you place them in a hyperosmotic, hypoosmotic or
isosmotic? - Answer ...
18. Be able to look at two solutions and tell which is hyper or hypoosmotic. - Answer ...
19. Be able to look at two solutions and tell which way osmosis will occur. - Answer ...
20. What is a producer? Consumer? - Answer producers (self-feeders) make their own organic
matter from inorganic nutrients
consumers - Answer (other-feeders) depend on plants or other animals for food
21. What is an autotroph? - Answer autotroph (producer)- ecosystems depend on them for
food
heterotroph (consumer) - Answer - eat plants or other animals
22. Know examples of each for questions 20 - 21 - Answer ...
23. What is the difference between cellular respiration and breathing? - Answer cellular
respiration requires a cell to exchange O2 and CO2 with its surroundings;
1. What do all living organisms need to sustain life? - Answer energy
2. What is energy? - Answer the capacity to do work
3. What are the different types of energy? - Answer kinetic energy- energy of motion potential
energy- stored energy
4. What is a calorie? - Answer the amount of energy that can raise the temperature of 1 gram
of water by 1 degree Celsius
5. What is a Calorie? (there is a difference between this one and the one above.) - Answer a
kilocalorie (1,000 calories)
6. What is the conservation of energy principle? - Answer Energy can be changed from one
form to another, but it cannot be created or destroyed
7. What is entropy? - Answer a measure of disorder, or randomness, in a system; every time
energy is converted from one form to another, entropy increases
8. What is activation energy? - Answer the energy that activates the reactants in a chemical
reaction; triggers a chemical reaction to proceed
9. What is an enzyme and how do they work? - Answer an enzyme is a protein that speeds up
chemical reactions; enzymes can function over and over again; enzymes work by lowering the
activation energy of a chemical reaction
10. What factors affect how well enzymes work? - Answer specificity, presence of inhibitor,
temperature, pH
11. How does an enzyme inhibitor work? - Answer an enzyme inhibitor is a substrate imposter
that plugs up to the active site or binds at a remote site and changes the enzyme's shape
12. What is a receptor? - Answer a molecule most often found on the surface of a cell which
receives chemical signals originating externally from the cell
13. What is ATP and what is it used for? - Answer ATP consists of an organic molecule call
adenosine plus a tail of three phosphate groups; ATP is used to power cellular work
, 14. How do you get energy from ATP? - Answer ATP stores energy obtained from food and
releases it as needed at a later time
15. What is the difference between diffusion and osmosis? - Answer diffusion- the movement
of molecules spreading evenly into the available space osmosis- the diffusion of water across a
selectively permeable membrane
16. What is hyper, hypo and istonic? - Answer ...
hypertonic- - Answer more solute than equilibrium
hypotonic- - Answer less solute than equilibrium
isotonic- - Answer in equilibrium
17. What happens to red blood cells if you place them in a hyperosmotic, hypoosmotic or
isosmotic? - Answer ...
18. Be able to look at two solutions and tell which is hyper or hypoosmotic. - Answer ...
19. Be able to look at two solutions and tell which way osmosis will occur. - Answer ...
20. What is a producer? Consumer? - Answer producers (self-feeders) make their own organic
matter from inorganic nutrients
consumers - Answer (other-feeders) depend on plants or other animals for food
21. What is an autotroph? - Answer autotroph (producer)- ecosystems depend on them for
food
heterotroph (consumer) - Answer - eat plants or other animals
22. Know examples of each for questions 20 - 21 - Answer ...
23. What is the difference between cellular respiration and breathing? - Answer cellular
respiration requires a cell to exchange O2 and CO2 with its surroundings;
