Prior to the 1940s, many biologists believed ____, which is composed of 20 different types of ____, was most likely the
genetic material.
a. protein; amino acids
b. DNA; amino acids
c. protein; nucleotides
d. DNA; nucleotides
e. RNA; nucleotides
ANSWER: a
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Amanda is a microbiologist who studies the pathogenic bacteria Streptococcus pyogenes. In what ways are they (Amanda and the bacteria) similar?
A. Both have cell walls. B. Both have linear chromosomes. C. Both have mitochondria for ATP production. D. Both are capable of sexual reproduction. E. Both obtain carbon from consuming organic molecules. 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 eukaryotes and prokaryotes? How does it relate to the question? 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?
How do humans use red algae polysaccharides?
A. Thickeners B. Herbicides C. Adhesives D. Detergents
The first successful treatment of a genetic disorder by gene therapy was the curing of a 4-year-old girl who had severe combined immunodeficiency disease
Because the engineered cells did not live forever, this child supplemented her treatment with regular doses of A) adenosine deaminase (ADA). B) insulin. C) hemoglobin. D) bacteria. E) B lymphocytes.
Viruses travel through animals mainly by lysing cells and then spreading to other cells. Plant cells are not easily lysed. If a pathogen enters a plant cell and does not initiate a hypersensitive response, what is the most likely way the virus would spread to other plant cells?
A. Through the chloroplasts B. Directly through the cell wall C. Through transport vesicles D. Through the plasmodesmata E. Through the central vacuole