identify the function of enzymes
22. a catalyst speeds up a reaction by lowering the
23. an is a biological catalyst that can be reused, but
can only have one type of substrate (they fit together like a lock and key).

investigation 1, experience 3: cells and microscopes
recognize the parts of a compound light microscope and the function of each
part. (refer to p.r8 in the online textbook for microscope questions)

24 how do you calculate the total magnification of the
microscope?

25. in a compound microscope, what part of the microscope should be used to adjust the amount of light illuminating
a prepared slide?

26. identify the steps required to focus an object starting from scanning power.

Question

identify the function of enzymes
22. a catalyst speeds up a reaction by lowering the
23. an  is a biological catalyst that can be reused, but
can only have one type of substrate (they fit together like a lock and key).

investigation 1, experience 3: cells and microscopes
recognize the parts of a compound light microscope and the function of each
part. (refer to p.r8 in the online textbook for microscope questions)

24 how do you calculate the total magnification of the
microscope?

25. in a compound microscope, what part of the microscope should be used to adjust the amount of light illuminating
a prepared slide?

26. identify the steps required to focus an object starting from scanning power.

Accepted Answer

### Question 22
# Explanation:
## Step1: Recall catalyst function
Catalysts speed up reactions by lowering activation energy.
## Step2: Fill in the blank
The term for the energy barrier lowered by a catalyst is "activation energy".
# Answer: activation energy

### Question 23
# Explanation:
## Step1: Recall biological catalyst
Biological catalysts are enzymes, which are specific (lock - and - key model) and reusable.
## Step2: Fill in the blank
The biological catalyst described is an "enzyme".
# Answer: enzyme

### Question 24
# Explanation:
## Step1: Recall magnification formula
Total magnification of a compound light microscope is calculated by multiplying the magnification of the ocular lens (eyepiece) by the magnification of the objective lens.
## Step2: State the formula
Total Magnification = Magnification of Ocular Lens × Magnification of Objective Lens
# Answer: Total magnification is calculated by multiplying the magnification of the ocular (eyepiece) lens by the magnification of the objective lens (Total Magnification = Ocular Magnification × Objective Magnification)

### Question 25
# Explanation:
## Step1: Recall microscope parts
In a compound microscope, the diaphragm (iris diaphragm) or the condenser (along with the diaphragm) is used to adjust the amount of light illuminating the slide. The iris diaphragm is a common part for this purpose.
## Step2: Identify the part
The part used to adjust the amount of light is the "diaphragm (or iris diaphragm)" (sometimes the condenser with the diaphragm, but diaphragm is the main part for light intensity adjustment).
# Answer: diaphragm (or iris diaphragm)

### Question 26
# Explanation:
## Step1: Start with scanning power
1. Place the slide on the stage and secure it with the stage clips. Make sure the specimen is over the light source.
2. Turn the revolving nosepiece to the scanning - power objective (usually the shortest objective, lowest magnification).
3. Use the coarse adjustment knob to move the stage up (or the objective down, depending on the microscope) until the specimen is in rough focus. You may look through the ocular lens while doing this.
4. Use the fine adjustment knob to bring the specimen into sharp focus at scanning power.
5. If you want to switch to a higher power objective, center the specimen in the field of view (so it will be in the field of view at higher power). Then, turn the revolving nosepiece to the low - power objective. Do not use the coarse adjustment knob at higher powers (except in some microscopes with a safety mechanism), use only the fine adjustment knob to focus.
## Step2: Outline the steps
Steps to focus from scanning power:
1. Place the slide on the stage and secure it.
2. Rotate to the scanning - power objective.
3. Use the coarse adjustment knob to get rough focus.
4. Use the fine adjustment knob for sharp focus at scanning power.
5. (Optional for higher power) Center the specimen, rotate to the next objective, and use the fine adjustment knob to focus.
# Answer:
1. Place the slide on the stage and secure it with stage clips, ensuring the specimen is over the light source.
2. Rotate the revolving nosepiece to the scanning - power objective.
3. Use the coarse adjustment knob to move the stage (or objective) until the specimen is roughly in focus (look through the eyepiece).
4. Use the fine adjustment knob to bring the specimen into sharp focus at scanning power.
5. (If moving to higher power) Center the specimen in the field of view, rotate to the next objective (low - power), and use only the fine adjustment knob to focus.

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QUESTION IMAGE

Question

Explanation:

Question 22

Step1: Recall catalyst function

Step2: Fill in the blank

Step1: Recall biological catalyst

Step2: Fill in the blank

Step1: Recall magnification formula

Step2: State the formula

Answer:

Question 23