Already have an account? Get multiple benefits of using own account!
Login in your account..!
Remember me
Don't have an account? Create your account in less than a minutes,
Forgot password? how can I recover my password now!
Enter right registered email to receive password!
Final Lab Project
Apples/Enzymatic Browning
Materials:
-Apple Slices
-test tube with 0.1% Ascorbic
-test tube with 0.1% Citric acid test tube
-test tube with 0.1% Acetic acid test tube
-test tube with 1.0% Acetic acid test tube
-Beaker with water
-tongs
-experiment mat
This experiment will monitor the amount of enzymatic browning of apple slices. In apples there is an enzyme called phenolase. When an apple is touched by oxygen, the phenolase catalyses the formation of brown pigments. If we treat the apples with acids such as ascorbic, citric or acetic acids this will reduce the level of browning. When fruits and vegetables are cut the enzymes are released in the presence of oxygen and produces brown pigments known as melanins.
First we will label a paper towel "Control" and place an untreated apple slice on the control towel. Using the tongs, dip each apple slice into the solutions (.1% ascorbic, .1% citric, .1% acetic, 1.0% acetic) and lay each slice tested with the different solutions onto a towel labeled with that solution. Take one slice and soak it in the beaker with water for 30 seconds and again place it on a paper labeled "Water". Begin to observe the apple slices every ten minutes for 1 hour.
a. compare the structure of the fetal pig heart and sheep heart. how are they similar? how are they different?b. why
The -10 and -35 sequences in bacterial promoters are separated by about two turns of the DNA double helix (remember genetics?). How do you think transcription would be affected if the deletion were introduced such that the -35 sequence was moved to -..
Which of the following statements about DNA replication is true? Okazaki fragments are DNA fragments synthesized on the leading strand. Single?strand binding proteins stabilize the open conformation of the unwound DNA.
Assume you have also identified a 3rd recessive mutation that you call crimson. Wasps homozygous for crimson have a red abdomen.
The gene (cv) is recessive and is known to be 13.7 Map units from the beginning of the chromosome. The recessive gene (f) is 51.7 map units from the beginning of the chromosome.
Choose and critique one of the three articles listed below. To post your critique to the Discussion Board, do the following.
Explain the difference between allopatricand sympatric speciation gene flow, reproductive isolation, genetic mutation, allele frequencies, and subpopulation. Finally, give a detailed example of how each type of speciation might occur.
A particular human disease is caused by a recessive allele. If one out of every 2500 babies is born with the disease, what is the frequency of the allele? Assume the population is in equilibrium.
Histone acetyltransferases: zero pointsfor no explanation
Interestingly after activation of the rtk by your antibody you notice that the downstream effects are different than the effects seen with the normal ligand for that receptor. Describe at least one way that this may be possible.
a patient with hepatitis B has reduced liver function. How will reduced function of her liver affect levels of hormones in her blood or urine?
As you work your way from the outside of a young stem to the inside, you will encounter the following tissues in which order? If the soil water potential (?W) is -0.20 MPa and the water potential (?W) inside a root hair is +0.10 MPa, water will flow:
Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!
whatsapp: +1-415-670-9521
Phone: +1-415-670-9521
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd