Biology Lab 1 practical
If a pill bug travels 3 mm in 30 seconds, what is its rate of speed?
0.09 mm/s
1.9
19mm equals how many cm?
2.7g
2700 mg equals how many grams?
3410 ml
3.41 equals how many ml?
.880
880 mm equals how many m?
33 degrees Celsius
90 degrees Fahrenheit equals how many degrees Celsius
What kind of animal is a pill bug?
A crustacean that lives on land.
What do scientists call the information they collect while doing experiments or making observations?
Data
40
If the total magnification of a slide is 400x and the ocular lens are 10x, what is the magnifying power of the objective being used?
Brown
If threads are layered from top to bottom, brown, green, red, which layer will come into focus first if you are using the microscope properly?
Phosopholipids
If two fatty acids, glycerol and a phosphate group undergo a dehydration reaction, what biomolecule forms?
negative
If you test a sample of a potato with the biuret reagent, what do you expect the results to be?
Negative
If you test a sample of potato with the biuret reagent, what do you expect the results to be?
Protein
If you test an unknown substance with the biuret reagents and it's purple, what is present?
Break the slide
If you use the coarse-adjustment knob to focus on an object with the high power objective, what problems will you encounter
Benedict's
If you want to test a sample to see if glucose is present, what reagent should you use?
Benedict's reagent
If you want to test a sample to see if glucose is present, what reagent should you use?
red
if a solution contains a large amount of glucose, what color will Benedict's reagent become?
Protein
if you test an unknown substance with the biuret reagent and it turn purple, what is present?
What do scientists do first when they begin to study a specific topic?
Observation
All organisms are made of cells.
Scientific Theories
What is the Scientific Method?
Steps: Observe, Hypothesis, Experiment, & Conclusion
Meniscus
To properly measure 20 ml of water, what must be at the 20ml mark of the graduated cylinder?
blue/black
what color will iodine turn when starch is present?
oils
what is the name used for plant fats?
Lipids
what kind of biomolecules are insoluble in water but soluble in alcohol or ether?
peptide
what kind of bond forms during a dehydration synthesis reaction involving two amino acids?
Enzymes
what kind of protein is lactase, the biomolecule that speeds up the breakdown of lactose
Purple/blue
If starch is present, what color will the iodine turn?
The data show that trans fat intake raises cholesterol and contributes to heart disease.
Conclusion
Which is made by a scientist following experiments and observations, a theory or a conclusion?
Conclusion
Diaphragm
If the amount of light passing through the condenser needs to be decreased, what microscope part should be adjusted?
Right
If the euglena are swimming to the left, which way should you move your slide to keep the organism in view?
Developing a scientific theory.
An encompassing conclusion based on many individual conclusions in the same field.
Starch
As what molecule do plants store glucose?
If a pill bug moves toward a substance, is it attracted to or repelled by that substance?
Attracted
What kind of skeleton does a pill bug have?
Exoskeleton
What structures do pill bugs use for gas exchange, and what condition must these structures be in to function properly?
Gills for gas exchange & slightly moist
Making Obervations
Help scientists begin their study of a particular topic.
Formulating a Hypothesis
Helps scientists decide how an experiment will be conducted.
What is a tentative decision about the outcome of an experiment?
Hypothesis
If your hypothesis was that your pill bug would be attracted to applesauce and your pill bug moved toward the applesauce, what would you say about your hypothesis?
Hypothesis supported
fine adjustment
If a slid is being viewed with the high power objective, which adjustment knob should be used to sharpen the focus?
Red/brown
If a solution contains a large amount of glucose, what color will the Benedict's reagent become?
Positive for glucose starch breaks down into glucose
If amylase is added to a sample of potato and you test it with Benedict's reagent 10 minutes later, what do you expect the results of the test to be?
Glucose
If maltose undergoes hydrolysis, what subunits results?
What do we call the sample that lacks the factor being tested and goes through all the experimental steps?
Negative Control
Data
Results of their experiments.
Negative Control
Sample or event-that is not exposed to the testing procedure. If the negative control and the test sample produce the same results, either the procedure is flawed or the hypothesis is false.
What do scientists develop after many years of experimentation and a lot of similar individual conclusions?
Scientific theory
Testing the Hypothesis
Scientists make further observations or perform experiments in order to test the hypothesis.
ocular lens
What is the name of the lens located near the eye?
Oils
What is the name used for plants fats?
Dipeptide
What kind of bond forms during a dehydration synthesis reaction involving two amino acids?
Scanning
What kind of microscope would be used to study a whole or opaque object?
Enzyme
What kind of protein is lactase, the biomolecule that speeds up the breakdown of lactose?
hydrolysis
What kind of reaction add water to break large biomolecules into subunits?
Hydrolysis
What kind of reaction adds water to break large biomolecules into subunits?
Fats/lipids
What kinds of biomolecules are insoluble in water but soluble in alcohol or ether?
emulisifiers
What must be present to successfully breakdown fats during digestion?
Parafocal
What word describes a microscope that remains in focus when the objective lense are changed?
Coming to a conclusion.
Whether their data support or do not support the hypothesis.
Scanning
Which objective should be in place when the microscope is put away?
transmission microscope b/c the light microscope issue powerful enough
Which type of microscope should be used to view a virus that is 50nm in size?