UA BSC 108 Exam 2 NEWEST ACTUAL EXAM 148
QUESTIONS AND CORRECT DETAILED ANSWERS (VERIFIED
ANSWERS) |ALREADY GRADED A+
What do all living organisms need to sustain life? - CORRECT ANSWER
Nutrients, water, and energy
What is energy? - CORRECT ANSWER The capacity to do work
What are the different types of energy? - CORRECT ANSWER Kinetic,
potential, thermal, chemical, and more
How do we measure energy? Why? - CORRECT ANSWER Joules or calories,
to quantify energy changes
What is the study of energy? - CORRECT ANSWER Thermodynamics
What is a calorie? - CORRECT ANSWER A unit of energy
What is a Calorie? (there is a difference between this one and the one above.) -
CORRECT ANSWER A kilocalorie, or 1000 small calories
What is the First Law of Thermodynamics? Know it and what it means. - CORRECT
ANSWER Energy cannot be created or destroyed, only transferred or changed in
form
Why is heat lost in biological systems? - CORRECT ANSWER Because no
process is perfectly efficient
Where does new energy come from? How is most energy lost (in what form)? -
CORRECT ANSWER The sun; lost as heat
What is the Second Law of Thermodynamics? Know it and what it means. -
CORRECT ANSWER Entropy of an isolated system always increases
What is entropy? - CORRECT ANSWER Measure of disorder
, How do you make a reaction go that requires energy? - CORRECT ANSWER
Provide energy (like ATP)
What is activation energy? - CORRECT ANSWER The energy needed to start
a reaction
What is an enzyme and how do they work? - CORRECT ANSWER Biological
catalysts that speed up reactions by lowering activation energy
What factors affect how well enzymes work? - CORRECT ANSWER
Temperature, pH, substrate concentration
How does an enzyme inhibitor work? - CORRECT ANSWER Binds to enzyme
and reduces its activity
What is ATP and what is it used for? - CORRECT ANSWER Energy currency
of the cell
How do you get energy from ATP? - CORRECT ANSWER By breaking its
high-energy phosphate bonds
What is the difference between diffusion and osmosis? - CORRECT ANSWER
Diffusion: movement of molecules; osmosis: diffusion of water
What is hyper, hypo and isotonic? - CORRECT ANSWER Hyper: high solute
concentration, hypo: low solute concentration, iso: equal solute concentration
What happens to red blood cells if you place them in a hyperosmotic, hypoosmotic or
isosmotic? - CORRECT ANSWER Hyper: shrink, hypo: swell, iso: no change
Be able to look at two solutions and tell which is hyper or hypoosmotic. - CORRECT
ANSWER Higher solute concentration: hyper, lower: hypo
Be able to look at two solutions and tell which way osmosis will occur? - CORRECT
ANSWER Water moves from hypo to hyper
What is a producer? Consumer? - CORRECT ANSWER Producer: makes own
food; Consumer: eats others
QUESTIONS AND CORRECT DETAILED ANSWERS (VERIFIED
ANSWERS) |ALREADY GRADED A+
What do all living organisms need to sustain life? - CORRECT ANSWER
Nutrients, water, and energy
What is energy? - CORRECT ANSWER The capacity to do work
What are the different types of energy? - CORRECT ANSWER Kinetic,
potential, thermal, chemical, and more
How do we measure energy? Why? - CORRECT ANSWER Joules or calories,
to quantify energy changes
What is the study of energy? - CORRECT ANSWER Thermodynamics
What is a calorie? - CORRECT ANSWER A unit of energy
What is a Calorie? (there is a difference between this one and the one above.) -
CORRECT ANSWER A kilocalorie, or 1000 small calories
What is the First Law of Thermodynamics? Know it and what it means. - CORRECT
ANSWER Energy cannot be created or destroyed, only transferred or changed in
form
Why is heat lost in biological systems? - CORRECT ANSWER Because no
process is perfectly efficient
Where does new energy come from? How is most energy lost (in what form)? -
CORRECT ANSWER The sun; lost as heat
What is the Second Law of Thermodynamics? Know it and what it means. -
CORRECT ANSWER Entropy of an isolated system always increases
What is entropy? - CORRECT ANSWER Measure of disorder
, How do you make a reaction go that requires energy? - CORRECT ANSWER
Provide energy (like ATP)
What is activation energy? - CORRECT ANSWER The energy needed to start
a reaction
What is an enzyme and how do they work? - CORRECT ANSWER Biological
catalysts that speed up reactions by lowering activation energy
What factors affect how well enzymes work? - CORRECT ANSWER
Temperature, pH, substrate concentration
How does an enzyme inhibitor work? - CORRECT ANSWER Binds to enzyme
and reduces its activity
What is ATP and what is it used for? - CORRECT ANSWER Energy currency
of the cell
How do you get energy from ATP? - CORRECT ANSWER By breaking its
high-energy phosphate bonds
What is the difference between diffusion and osmosis? - CORRECT ANSWER
Diffusion: movement of molecules; osmosis: diffusion of water
What is hyper, hypo and isotonic? - CORRECT ANSWER Hyper: high solute
concentration, hypo: low solute concentration, iso: equal solute concentration
What happens to red blood cells if you place them in a hyperosmotic, hypoosmotic or
isosmotic? - CORRECT ANSWER Hyper: shrink, hypo: swell, iso: no change
Be able to look at two solutions and tell which is hyper or hypoosmotic. - CORRECT
ANSWER Higher solute concentration: hyper, lower: hypo
Be able to look at two solutions and tell which way osmosis will occur? - CORRECT
ANSWER Water moves from hypo to hyper
What is a producer? Consumer? - CORRECT ANSWER Producer: makes own
food; Consumer: eats others
