RNA molecules differ from DNA molecules because only RNA
A. does not have thymine.
B. has ribose.
C. has uracil.
D. is typically one strand of nucleotides.
E. All of these choices are correct.
Answer: E
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The clublike structure producing the spores of typical mushrooms is called a(n) _____.
Fill in the blank(s) with the appropriate word(s).
2D chromatography is so named because ____
a. there are two steps: labeling with a radioactive marker and separation via chromatography b. the molecules are separated into a linear arrangement, meaning two dimensions c. the process separates the molecules in two directions, first along the x axis and then along the y axis d. two different solutions are used in the paper chromatography process e. two different types of radioactive markers must be used
Which was present first?
a. mitochondria b. aerobic respiration c. chloroplasts d. fungi e. photosynthesis
Gel electrophoresis is a technique used to separate a mixture of DNA fragments. During this process, large DNA fragments move longer distances than small DNA fragments when an electric current is applied
Indicate whether the statement is true or false