Which of the following is true of fatty acids?
A) Fatty acids are synthesized by the stepwise addition of three carbon units.
B) Unsaturated fatty acids are usually branched.
C) Fatty acids with 24 carbons are most common.
D) Saturated fatty acids have no double bonds between carbons.
E) Laurate is an unsaturated fatty acid.
D) Saturated fatty acids have no double bonds between carbons.
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In later chapters, you will learn more about the regulation of gene expression. One way to regulate gene expression is to make changes to the histone proteins to alter how tightly the DNA is coiled and wrapped. The more tightly coiled and wrapped a particular region of DNA is, the less likely it is that the genes in that region will be expressed. Bearing this in mind, how tightly do you think regions of heterochromatin are compacted?
A. Very tightly B. Moderately C. Loosely D. Not at all Clarify Question · What is the key concept addressed by the question? · What type of thinking is required? · What key words does the question contain and what do they mean? Gather Content · What do you know about gene expression? 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?
When arabinose is present in the environment, the AraC protein acts as a(n) ________ for the E. coli ara operon.
Fill in the blank(s) with the appropriate word(s).
Plastids originated from which of the following groups of bacteria?
A. Cyanobacteria B. Spirochaetes C. Proteobacteria D. Staphlococcus E. Actinobacteria
Both human pathogens and normal microbiota are typically classified as:
psycrophiles thermophiles mesophiles hyperthermophiles