Which of the following statements about DNA replication is INCORRECT?
A. It begins at multiple origins of replication sites along eukaryotic chromosomes.
B. Each strand within the DNA double helix is used as a template for synthesis of a new strand.
C. It requires that both strands of the double helix be separated from each other.
D. It proceeds with the addition of new nucleotides to the 3? end of a growing DNA strand.
E. It is powered by the hydrolysis of ATP.
Answer: E
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What is responsible for termination of transcription in eukaryotic protein-coding genes?
A) a polyadenylation signal or poly(A) B) a termination loop composed of guanine C) a sigma factor D) a portion of the polymerase holoenzyme E) three nonsense mutations in sequence
An embryo with two X chromosomes will develop female characters because of
a. the presence of female hormones in development. b. the absence of testosterone during early embryology. c. the SRY regions of the X chromosomes. d. maternal substances passed to the zygote during fertilization. e. human chorionic gonadotropin.
In performing a bacterial spore staining techniques, the decolorization reagent is
A. a mixture of different alcohols B. a mixture of acetone and alcohol C. a mixture of acid and alcohol D. a mixture of acetone and ether E. none of the above
In western Sweden, coastal marine ecosystems have been exposed to discharge of nutrients over several decades. As a result, algal blooms are more common.Algal mats on the sea bottom limit sunlight and alter the amount of dissolved oxygen in the water. Additionally, some algae produce toxic compounds that can enter shellfish. Furthermore, the decomposing algae produces a strong odor. Which statements below correctly match the outcomes to their effects on value of the ecosystem? Check all that apply.
_____ Aesthetic value is lost because the algae makes the beach ugly and smells terrible. _____ Indirect economic value is lost because fisherman cannot catch their usual fish. _____ Direct economic value is lost because the toxic shellfish cannot be eaten. _____ Aesthetic value is gained because the algae could be used for biomass. _____ Direct economic value is lost because the properties near the beach aren’t as desirable. Additional: 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 the economic value of ecosystems? 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?