BIO 1404: post lab Questions and Answers 100%
Correct
Are all three threads in focus at 40X? Correct Ans-no
Which objective 4x or 40x has the greatest depth of field? Correct Ans-4x
List some unique features of the plant cell you see in the microscope Correct Ans-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 Correct Ans-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
Correct Ans-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
, BIO 1404: post lab Questions and Answers 100%
Correct
Which one of the solutions is the positive control and which one of the solutions is the
negative control for the Benedict's reaction? Correct Ans-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?
Correct Ans-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? Correct Ans-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?
Correct Ans-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
, BIO 1404: post lab Questions and Answers 100%
Correct
Which one of the solutions is the positive control, and which one of the solutions is the
negative control for the Biuret reaction? Correct Ans-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? Correct
Ans-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? Correct Ans-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? Correct Ans-the lipids in polar solvents are insoluble
while they are soluble in nonpolar solvents like acetone
What happened when the emulsifier was added? Correct Ans-when the emulsifier was
added it helped disburse the fat molecules
Correct
Are all three threads in focus at 40X? Correct Ans-no
Which objective 4x or 40x has the greatest depth of field? Correct Ans-4x
List some unique features of the plant cell you see in the microscope Correct Ans-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 Correct Ans-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
Correct Ans-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
, BIO 1404: post lab Questions and Answers 100%
Correct
Which one of the solutions is the positive control and which one of the solutions is the
negative control for the Benedict's reaction? Correct Ans-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?
Correct Ans-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? Correct Ans-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?
Correct Ans-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
, BIO 1404: post lab Questions and Answers 100%
Correct
Which one of the solutions is the positive control, and which one of the solutions is the
negative control for the Biuret reaction? Correct Ans-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? Correct
Ans-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? Correct Ans-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? Correct Ans-the lipids in polar solvents are insoluble
while they are soluble in nonpolar solvents like acetone
What happened when the emulsifier was added? Correct Ans-when the emulsifier was
added it helped disburse the fat molecules
