Mid Term Questions 1-8
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South Texas College *
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Dec 6, 2023
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LAB 1 & 2 Quizzes
If you wear, contact lenses in the school laboratory:
Notify your instructor that you wear contact
lenses.
After completing an experiment, all chemical waste should be
disposed of according to your
instructor's directions
.
In the pill bug experiment, the substance used as the control was
sand.
MSDS stands for Material Safety Data Sheet,
TRUE.
Approved eye protection devices such as googles are worn in the laboratory,
anytime chemicals
including water heat or glassware are used.
If you do not understand the direction of part of a lab procedure, you should:
ask the instructor before
proceeding.
A tentative explanation for some observation or some phenomenon is known as a
hypothesis.
Completely closed-toed shoes are encouraged but not necessary,
FALSE.
List in the correct order the steps in the Scientific Method:
Observation, Hypothesis, Prediction,
Experiment, Data/Results, Conclusion.
When gathering glassware and equipment, for an experiment, you should
Read all directions carefully
to know what equipment is necessary. Examine all glassware to check for chips or cracks. Clean any
glassware that appears dirty. *All the answer choices are correct*
Lab 2 Metric Measurement Quiz
The basic measurement of
ma
ss is
GR
AM
.
Match the following statements with their corresponding temperatures.
Freezing point of water
0
°C
Normal body temperature
37
°C
Water boils
100
°C
Room temperature
20-25
°C
The
l
iter is a unit of
vo
l
ume.
Remember that in science we always use the metric system and therefore your temperatures should
be
Celsius.
When measuring any powdered chemicals using an electronic balance, one must first tare the weight
of the weighing boat.
TRUE
Which prefix is the sma
ll
est,
mi
ll
i.
The
basic
m
easurement length is
m
eters.
Lab 3 Chemical Composition of Cells
The Biuret Test identifies what type of macromolecules,
Proteins.
For how long should the samples be heated when testing the presence of simple sugars?
3 minutes
Below are the results of a mock Benedict test performed in the lab. Match the letter with the
corresponding result of the test.
A.
No
reducing sugars
(Blue)
B.
Trace
amounts of reducing sugars.
(Green)
C.
Moderate
amounts of reducing sugars
(Orange)
D.
High
amounts of reducing sugars.
(Red)
In the paper test, the paper turns translucent and gets a grease spot in the presence of lipids,
TRUE.
Which test would you use to test for presence of lipids,
Paper Test.
What color indicates a positive result for presence of proteins,
Dark-blue purple.
Which of the following tests required the samples to be heated,
Benedict Test.
Water is used as a sample for all your experiments, this is because water serves as
negative control.
The Benedict Test identifies what type of macromolecule,
monosaccharides.
What kind of macromolecule is albumin,
Protein.
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INTRUCTIONS:
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Failed to follow instruction will report directly to BARTLEBY.
QUESTION;
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INTRUCTIONS:
- Do not copy here in BARTLEBY or GOOGLE
- PLEASE ANSWER PROPERLY
Failed to follow instruction will report directly to BARTLEBY.
QUESTION;
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nsert
Format
Arrange
View
Share
Window
Help
Biology Lab Exam 1 Sp 21
目
125% v
Collaborate
Insert
Table
Chart
Тext
Shape
Media
Comment
View
Zoom
Add Page
3. (1 point) Show the answer to the following question in correct significant figures.
10.219 + 3.12 =
4. (7 pts) True or False. Circle the correct answer.
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True or False. The mode is the most commonly occurring number in a data set.
True or False. One milliliter (mL) equals 1,000,000 microliters (µL).
True or False. Peroxidase activity increases when the enzyme is boiled
True or False. Enzymes are carbohydrates.
True or False. Denaturing involves an enzyme breaking down into individual amino acids.
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MAR
étv
9.
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True or False
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I.
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III. 150 Da,2+
IV. 200 Da, 4+
O II, I, IV, III
O IV, II, III, I
O I, II, III, IV
O IV, III, II, I
QUESTION 19
How many fragments will be produced after the following peptide is digested with trypsin?
DNAFINGERPRINTING
1
O 2
O 4
0 3
QUESTION 20
70F Mostly coudy
Click Save and Submit to save and submit. Click Save All Ansuers to sace all anwers
Type here to search
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this is a practice problem to prepare for the exam. match the correct description to the image
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Failed to follow instruction will report directly to BARTLEBY.
QUESTION;
1. Polysaccharides generally do not give a positive test with Fehling’s solution. Why?
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wing organe
pols schoology.comcommo-assessment-delivery/start/3270652045?action=onresume&submissionid=247318926
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Jose puts a drop of food dye into a glass of water and observes the dye forming colorful swirls before eventually turning the water green. This observation
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Color of top thread:
Color of middle thread:
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b.
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b.
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Related Questions
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