Roxbury PrepMs. Goodman

8th Grade Science

Name: Date: Advisory:Assignment:

3.4 Homework: Regents Review Row:

Cell and Cell structure

REGENTS REVIEW

1. Which sequence contains the correct order of steps for a student to follow to observe the nucleus of protozoa in a stained wet mount, using a compound light microscope?

Begin by using the Focus using the Focus using the Switch to the(1) Low-power objective

Coarse adjustment

Fine adjustment

High power objective

(2) Low-power objective

Fine adjustment Coarse adjustment

High power objective

(3) high-power objective

Coarse adjustment

Fine adjustment

Low power objective

(4) high-power objective

Fine adjustment Coarse adjustment

Low power objective

a. 1b. 2c. 3d. 4

2. The diagram below shows a microscopic field containing a portion of the cross section of a root tip.

How should a student adjust the microscope in order to view a greater portion of the root tip?

a. Stay at the same power and adjust the focusb. Stay at the same power but increase the size of the opening of the

diaphragm

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Roxbury PrepMs. Goodman

8th Grade Science

c. Switch to a lower power and decrease the size of the opening the diaphragm

d. Switch to a higher power and adjust the focus

3. When using a compound light microscope, the most common reason for staining a specimen being observed is to

a. Keep the organism from moving aroundb. Make the view more colorful c. Determine the effects of chemicals on the organismd. Reveal details that are otherwise not easily seen

4. Which cell structure is correctly paired with its primary function?a. Ribosome—protein synthesisb. Mitochondria—movementc. Vacuole – cell divisiond. Nucleus – storage of nutrients

5. Which laboratory procedure is represented in the diagram below?

a. Placing a coverslip over a specimenb. Removing a coverslip from a slidec. Adding stain to a slide without removing the coverslipd. Reducing the size of air bubbles under a coverslip

6. While viewing a specimen under high power of a compound light microscope, a student noticed that the specimen was out of focus. Which part of the microscope should the student turn to obtain a clearer image under high power?

a. Eyepieceb. Coarse adjustmentc. Fine adjustment d. Nosepiece

7. Complete the Venn diagram below with similarities and differences between eukaryotic and prokaryotic cells.

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POE CHECKLIST

Interactively read question Cross out wrong

word/phrase in incorrect answer choices

ID wrong answer choices Circle correct answer

Roxbury PrepMs. Goodman

8th Grade Science

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