BIOS 1404 PRACTICAL Exam I

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BIOS 1404 PRACTICAL Exam I

• List some unique features of the plant cell

–Answer Cell Wall Chloroplast One large Vacuole Plasmodesmata Plastids Rectangular (fixed)

• List some unique features of the animal cell

–Answer Centriole One or more small vacuoles Cilia Round (irregular shape)

• List some common features of both plant and animal cells

–Answer Cell Membrane Cytoplasm Rough ER Nucleolus Golgi Bodies Lysosome Smooth ER Nucleus Ribosomes Mitochondria Microtubules/microfilaments

• As you view the letter "e", how is it oriented? Upside down or right side up?

–Answer When viewing the letter "e" it is oriented right side up.

• How does the image move when the slide is moved to the right or left?

–Answer When the slide is moved to right the "e" is moved to the left and vise versa.

• How does the image move when the slide is moved toward or away from you?

–Answer When the "e" is moving toward me the "e" moves up on screen and when the image is moved 1 / 3

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away from me the "e" moves down.

• What happens to the brightness of the view when you go from 4X to 10X?

–Answer I feel it gets brighter from 4x to 10x.

• Which objective 4X or 40X has the greatest depth of field?

–Answer The objective with the greatest depth of field is 40x.

• Which device is the most precise?

–Answer The micropipette was the most precise device.

• Which device has the best accuracy?

–Answer The micropipette was also the device with the best accuracy.

• Which device, the transfer pipette or the eyedropper, is the most precise?-

–Answer The eyedropper was the most precise device.

• Which device, the transfer pipette or the eyedropper, has the best accura- cy?

–Answer The transfer pipette was the device that had the best accuracy.

• Deci (d) Centi (c) Milli (m) Micro (u) Nano (n)

Pico (p) –Answer 10-1 10-2 10-3 10-6

10-9 2 / 3

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10-12

• Accuracy

–Answer Closest to actual value

• Precision

–Answer Closest to one another

• Positive Control

–Answer contains the variable you are testing A positive reaction shows that your test reacted as expected; it also shows you what a positive test looks like

• Negative Control

–Answer does NOT contain the variable you are testing. It contains only the solvent (often distilled water with no solute) and does not react.Shows you what a negative test result looks like

• Benedict's Test

–Answer Carbohydrate aka reducing sugars Identifies reducing sugars based on their ability to reduce the cupric (Cu2+) ions to cuprous (Cu+) oxide at basic (high) pH.Cuprous oxide is GREEN to REDDISH ORANGE A GREEN solution indicates a small amount of reducing sugars A REDDISH ORANGE indicates an abundance of reducing sugars Non-reducing sugars produce NO change in color (solution remains blue)

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