Imagine that DNA is composed of equal proportions of six different types of nucleotide, instead of the normal four. The six nucleotides are A, C, G, T, X, and Y. In this new type of DNA molecule, A pairs with T, C pairs with G, and X pairs with Y. What would be the average size of the DNA fragments produced when this new DNA is cut by a restriction endonuclease with a four-base recognition sequence?
A) 125 bp
B) 256 bp
C) 425 bp
D) 1056 bp
E) 1296 bp
E) 1296 bp
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A relationship in which one organism is found on the surface of another is referred to as a(n) ________.
Fill in the blank(s) with the appropriate word(s).
Which of the following statements about abscisic acid are true? Check all that apply.
_____ It is produced chiefly in mature green leaves and in fruits. _____ It stimulates the growth of dormant buds. _____ It promotes leaf senescence. _____ It plays an important role in controlling the opening and closing of stomata. _____ It plays a role in seed dormancy.
An enhancer is a DNA element that can be bound to a regulatory transcription factor, which leads to ______
Fill in the blank(s) with the appropriate word(s).
Why can flowers be brought "into bloom" out of season by changing the duration of light and darkness?
What will be an ideal response?