During translation, translocation refers to
A. joining a tRNA molecule to the ribosome.
B. moving the ribosome along the mRNA molecule.
C. releasing a tRNA molecule from the ribosome.
D. joining an amino acid to the next amino acid in the chain.
E. joining an amino acid to a tRNA molecule.
Answer: B
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Triatoma, commonly called "kissing bugs," are vectors of
A. African sleeping sickness. B. Chagas' disease. C. Cyclosporiasis. D. Leishmania. E. schistosomiasis.
Which component of the complex described enters the exit tunnel in the large subunit of the ribosome?
A) tRNA with attached lysine (#1) B) tRNA with polypeptide (#2) C) tRNA that no longer has attached amino acid D) newly formed polypeptide E) initiation and elongation factors
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?
Scientists currently hypothesize that the first enzymes were composed of
1.DNA. 2.protein. 3.RNA. 4.lipid. 5.carbohydrates.