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BIO 1404: Qs & As

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Uploaded on September 6, 2024
Number of pages 7
Written in 2024/2025
Type Exam (elaborations)
Contains Questions & answers

bio 1404 qs
micropieptte
what is the total magnification at 4x 10x 40x
what is the order of the threads from top to botto
do free amino acids have peptide bonds
why are there no chloroplasts in the on

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BIO 1404: Qs
For 1mL of water what device is more precise? - Answer-micropieptte

For 1mL of water what device is more accurate - Answer-transfer pipette

Which device, the transfer pipette, or eye dropper, is the most precise when
measuring the volume of a drop? - Answer-transfer pipette

Which device, the transfer pipette or the eyedropper, has the best accuracy when
measuring the volume of a drop? - Answer-transfer pipette

As you view the "e",how is it oriented? upside down or right side up? - Answer-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 the right the image moves to the left. when the slide is
moved to the left the image moves to the right

How does the image move when the slide is moved toward or away from you? -
Answer-when the slide is moved towards myself the image moves upwards. when
the slide is moved away from me the image moves downwards

What happens to the brightness of the view when you go from 4x to 10x? - Answer-it
gets brighter

what is the total magnification at 4x, 10x, 40x? - Answer-4x=40
10x=100
40x=400

if you didn't already know what you were looking at, could you determine at 40X that
you were looking at the letter "e"? How? - Answer-not really, but you can follow the
shadow and outline of the letter

What is the order of the threads from top to bottom? - Answer-yellow, blue, red

Are all three threads in focus at 4x? - Answer-yes

Are all three threads in focus at 40X? - Answer-no

Which objective 4x or 40x has the greatest depth of field? - Answer-4x

List some unique features of the plant cell you see in the microscope - Answer-the
plant cell was blue and was rectangular in shape. it had shades of darker blue going
throughout the cell

List some unique features of the animal cell you see in the microscope - Answer-the
animal cell has purple spatters and had more of a pattern than shape

, List some common features of both plant and animal cells you see in the microscope
- Answer-both cells had shades of the same color, the plant cell has shades of blue
and the animal cell had shades of purple. They both had patterns, the animal cell
had a spattered pattern and the animal cell had a striped pattern

Which one of the solutions is the positive control and which one of the solutions is
the negative control for the Benedict's reaction? - Answer-the positive control was
the onion juice while the distilled water was the negative control for the benedict's
reaction

Which contains more reducing sugars, potato juice or onion juice, how do you know?
- Answer-the onion had more reducing sugars because the potato juice remained
blue and the onion juice turned a green color indicating a small amount of reducing
sugars

Which one of the solutions is the positive control, and which one of the solutions is
the negative control for the iodine reaction? - Answer-the positive control was the
starch solution while the negative control was the distilled water

which colors more intensely for the iodine reaction, onion juice or potato juice? Why?
- Answer-the potato juice colored more intensely because it colored a blackish color
indicating a positive test for starch while the onion juice was a yellow color which
was a negative test for starch

Which one of the solutions is the positive control, and which one of the solutions is
the negative control for the Biuret reaction? - Answer-the positive control was the
protein solution, while the negative control was the distilled water

Which contains more peptide bonds egg albumin or honey? How do you know? -
Answer-the egg albumin contained more peptide bonds because it produced a light
purple color indicating it was positive for test for proteins. The honey produced a
yellow green color indicating a negative result

Do free amino acids have peptide bonds? - Answer-no free amino acids do not react
positively and it reflected in our experiment when the amino acid solution tested
negative

What do you conclude about the solubility of lipids in polar solvents such as water
compared to nonpolar solvents such as acetone? - Answer-the lipids in polar
solvents are insoluble while they are soluble in nonpolar solvents like acetone

What happened when the emulsifier was added? - Answer-when the emulsifier was
added it helped disburse the fat molecules

Which one of the solutions is the positive control, and which one of the solutions is
the negative control for the sudan IV reaction? - Answer-the positive control was the
lipid solution while the distilled water was the negative control

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