Week 6 Discussion Section Slides

Welcome to Week 6 Discussion!

05/12/2023

IA: Sehee Oh

Agenda

2. Announcements

3. Quiz 2 Reflection (extra credit)

4. Content Review

5. Week 6 Discussion Section Activity

1. Check-In

How are you all doing today on the sheep scale?

Any weekend plans?

1. Check-In

1.Week 6 Scientist Spotlight

Extra Credit due Sunday 11:59pm

1. Ch11 and 12 textbook HW

2. Learning Catalytics for Class 17-18

Assignments due Sunday 11:59pm

2. Announcements

Please make sure to complete all of the questions for the full 5 point extra credit!

If you'd like to share what worked for you and/or what didn't work, please share in the chat or by raising your hand function :)

Let's take ~5 mins to complete the quiz 2 reflection!

3. Quiz 2 Reflection

Content Review

+

Week 6 Section Activity

Photosynthesis + Cell Signaling

Photosynthesis
Content Review

Experiments:
Sources of Biomass

Willow Experiment shows…

The mass of the plant did not come from the soil.

Evidence:

He observed that the mass of the soil did not change significantly even though the plant’s mass increased drastically.

Oxygen Labeling
Experiment

Oxygen Labeling Experiment

The oxygen-labeling experiment shows…

​The oxygen atoms in water become part of oxygen gas.

Multiple Choice

a. What conclusions can be drawn with certainty from this experiment alone? Choose all

that apply.

• The oxygen atoms in carbon dioxide do not become part of oxygen gas.

• The carbon atoms in carbon dioxide become part of glucose.

• None of the above.

Multiple Choice

b. Justify why you chose or did not choose answer choice A, “The oxygen atoms in carbon

dioxide do not become part of oxygen gas.” in part a. (suggestion: 1-2 sentences)

• The oxygen released by photosynthesis was indeed the heavy oxygen from carbon dioxide.

• If they became part of oxygen gas, the oxygen gas would have heavy oxygen, which it

  doesn’t.

• None of the above.

Multiple Choice

c. Justify why you chose or did not choose answer choice B, “The carbon atoms in carbon

dioxide become part of glucose,” in part a. (suggestion: 1-2 sentences).

• Didn't choose B because... The statement is true because of conservation of mass, BUT this experiment DOESN'T address the carbon, so it is not a conclusion you can draw from this experiment.

• Chose B because If the oxygen released is from CO2, the carbon in glucose MUST be also from the CO2.

• None of the above.

Two Stages of
Photosynthesis

There are 2 major stages
in photosynthesis:

1.

Light reactions

2.

Calvin cycle

First, there are the light
reactions.

The light reactions occur
in the thylakoid
membrane of the
chloroplast.

Putting it all together… (light reactions)

Overall in the
light reactions

Inputs:

light, ADP+Pi ,

H2O, NADP+

Outputs:

NADPH, ATP, O2

Multiple Select

Which of these are true statements about photosynthesis? Choose all that apply.

• The oxygen atoms in carbon dioxide do not become part of oxygen gas.

• The oxygen atoms in carbon dioxide become part of glucose.

• The oxygen atoms in water do not become part of glucose.

• The carbon atoms in carbon dioxide become part of glucose.

Cell Signaling

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Happy teaching!

​

Multiple Choice

Which of the two amino acids shown on the right can be phosphorylated?

• Serine

• Glycine

Multiple Select

A. How will this change affect the total amount of signals sent by FGFR3 (receptor), and why?

• Decreased amount of signals sent be FGFR3

• Increased amounts of signals sent by the FGFR3

• Reasoning 1: Normally, FGFR3 would not signal

  unless it is dimerized by FGF3 (signal molecule), but the change means that it will signal even without FGF3 receptor present.

• Reasoning 2: Without the FGF3, there can not be any signals sent by the FGFR3 receptor.

Multiple Choice

B. How will this change affect the growth of the bones, and why?

• It will shorten the bones because the FGFR3 (receptor) will turn on too early.

• No affect on bone length

• Without the FGF3, the bones will be longer than normal.

https://forms.gle/wy2qB7yQFU6f8nVh8

​Link for Attendance

​Thanks for coming!

See you all next week! :D