Researchers can deliver genes into plants by using ____
a. PCR
b. DNA sequencing
c. electric or chemical shocks
d. gel electrophoresis
e. DNA segmentation
ANSWER: c
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In magnesium-deficient plants the older leaves show more severe symptoms of chlorosis which is a yellowing of the leaves than younger leaves. What is the best explanation?
A. There is more time for the symptoms to develop in older leaves. B. Chlorophyll is transported from the older leaves to the younger leaves. C. Magnesium is more soluble in younger leaves. D. Scarce magnesium is removed from older leaves and translocated to support younger, more active leaves. E. Older leaves need less chlorophyll. Clarify Question · What is the key concept addressed by the question? · What type of thinking is required? · What key words does the question containand what do they mean? Gather Content · What do you already know about the importance of magnesium in chlorophyll? How does it relate to the question? Consider Possibilities · What other information is related to the question? Which information is most useful? Choose Answer · Given what you now know, what information and/or problem solving approach 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?
Suppose that the first part of a new polypeptide chain being produced in a eukaryotic cell has a signal peptide. Where would this polypeptide be located within the cell as it is maturing?
a. first in the rough ER, and then in the Golgi apparatus b. first in the cytoplasm, and then in the rough ER c. in the cytoplasm only d. in the Golgi apparatus only
Which two enzymes catalyze the steps converting the toxic superoxide ion to less harmful oxygen gas?
A. superoxide dismutase and catalase B. catalase and hydrogen peroxidases C. superoxide dismutase and hydrogen peroxidase D. superoxide dismutase and oxidase E. catalase and oxidase
At the end of transcription,which cells add a 5' cap to the DNA?
What will be an ideal response?