Why are carrots said to be good for you?
A. That is just an old wive's tale.
B. Beta-carotene, the orange pigment in carrots, is a precursor to Vitamin A and retinal, the cofactor in photopigments.
C. Beta-carotene, the orange pigment in carrots, is necessary to form lens proteins.
D. Carrots have large amounts of glutamate, a neurotransmitter that activates sensory neurons.
Clarify Question
What is the key concept addressed by the question?
What type of thinking is required?
Gather Content
What do you already know about carrots? What other information is related to the question?
Choose Answer
Given what you now know, what information is most likely to produce the correct answer?
Reflect on Process
Did your problem-solving process lead you to the correct answer? If not, where did the process break down or lead you astray? How can you revise your approach to produce a more desirable result?
B. Beta-carotene, the orange pigment in carrots, is a precursor to Vitamin A and retinal, the cofactor in photopigments.
Clarify Question
What is the key concept addressed by the question?
· Why are carrots good for you?
What type of thinking is required?
o This is an analyze question because you have to make a link between something in carrots to an effect on health.
Gather Content
What do you already know about carrots? What other information is related to the question?
· You already know that carrots are orange and full of vitamins. What makes a carrot orange? It is called beta-carotene, an orange pigment. You may have heard that carrots are good for you vision, but why? Beta-carotene is a precursor to Vitamin A and retinal, which is important in the production of photopigments that are needed for vision.
Choose Answer
Given what you now know, what information is most likely to produce the correct answer?
· The statement that beta-carotene is necessary to form lens proteins is incorrect. Also, carrots do not have large amounts of glutamate (which would be found in foods with protein). Since beta-carotene is a precursor to Vitamin A and retinal, which are cofactors in photopigments, eating carrots rich in this compound can be good for your eyes and vision.
Reflect on Process
Did your problem-solving process lead you to the correct answer? If not, where did the process break down or lead you astray? How can you revise your approach to produce a more desirable result?
o Answering this question correctly depended not only on distinguishing between compounds that could be found in carrots, but also understanding the functional role of the proper compound (beta-carotene) and how this might benefit vision. If you selected a wrong answer, which one? Did you think that since the lens is a vital part of the eye, and you knew that carrots help vision, that it was the correct answer? Did you think this was just an old wive’s tale your mother told you so you would eat your vegetables?
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Fill in the blank with correct word.
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You have purified DNA from your recently deceased goldfish. Which of the following restriction nucleases would you use if you wanted to end up with DNA fragments with an average size of 70 kilobase pairs (kb) after complete digestion of the DNA?
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