Midterm Review 4 - Solutions

These solutions are for today's review on cellular respiration, photosynthesis, mitosis, DNA and feedback.

Warm-up Questions:

a) guard cell (be aware - the stomate/stoma is just a space within the leaf, and does not actively control anything.)

b) green (The colors we see are those colors that are NOT absorbed.)

c) mitochondrion

d) chloroplast

e) 6CO2 + 6H2O ---light---> C6H12O6 + 6O2

f) C6H12O6 + 6O2 -------> 6CO2 + 6H2O + ATP (usable energy)

g) oxygen

h) cellular respiration (fermentation is faster, but it uses up glucose much more quickly.)

i) TACCGATACC

j) CCAAGGUU

k) A goes with T, C goes with G

l) gene, DNA, chromosome, cell

m) 24 (Daughter cells after mitosis will be the same as the original cell.)

n) metaphase

o) interphase

p) positive feedback

q) dynamic equilibrium

r) independent variable - type of fruit

MC Questions

1. (2)

2. (3)

3. (2)

4. (3)

5. (4)

6. (Sorry about the strange formatting and skipping the diagram)

a) (1)

b) (3)

9. (2)

10. Some organisms change solar energy into chemical energy using photosynthesis. This process takes place in chloroplasts.

11. (Remember that cells after division are identical to each other and to the original cell.)

12.

a) oxygen gas (Cell A is a plant cell based on the diagram. Substance X is sent out as a waste product from cell A, and is taken in by cell B, therefore it must be oxygen gas.)

b)cellular respiration

c) mitochondria (Both plant and animal cells have mitochondria, because they must both perform cellular respiration.)

68. (There are many possible correct answers that refer to the relationship between the independent and dependent variable.) Examples:

• Plants grown at higher temperatures will grow tall more quickly
• If the temperature increases, the rate that a plant will grow will decrease.

(Do NOT explain in a hypothesis - merely state a relationship between the variables in the experiment. In short, never use the word '"because" in a hypothesis.)

69. Temperature and the height of the plant, for example. (This should match the quantities being measured in your hypothesis.)

70. (In questions like this, remember the things we have discussed that make for an experiment with reliable results, such as using multiple trials, and ensuring only one independent variable.)

Examples of correct answers:

Use multiple plants at each temperature, use more temperature values, conduct repeated trials of lily plants, increase the sample size.

Final Question:

Errors in the investigation include...

• multiple independent variables (females given more food than the males, males and females receive different amounts of ibuprofen.)
• no control group (mice given regular amounts of food and water, but no ibuprofen.)

And, to continue the tradition of sharing cool stuff with you at the end of a review session, check out the video below to see some of the most frightening insects I've seen in a while...



Oh yeah, the bonus word for Monday, January 25th is evolution. Send me an email or text with the word before 10 PM to be eligible for your prize tomorrow.