Which of the following structural features is common to cellulose, chitin, and peptidoglycan?
A) They are all composed of glucose in either the ? or ? form.
B) They all contain peptide bonds.
C) They can all form bonds between polymer chains that create parallel strands.
D) They are all composed of highly branched fibers.
Answer: C
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Beginning with the simplest level of structure, which order of organization of genetic material is CORRECT?
A. DNA, nucleotide, gene, genome, chromosome B. nucleotide, DNA, gene, chromosome, genome C. DNA, nucleotide, gene, chromosome, genome D. nucleotide, DNA, gene, genome, chromosome E. nucleotide, DNA, chromosome, gene, genome
That contain single-stranded DNA Most phages
A. are extruded. B. contain a positive-sense DNA strand. C. have their DNA transformed to double-stranded DNA before replication and transcription occur. D. All of the choices are correct
The hypersensitivity treatment that stimulates an increase of IgG and regulatory T cells as well as a decrease in IgE is known as
A. desensitization. B. immunity. C. sensitization. D. exposure. E. anaphylaxis.
What are two main reasons why DNA mutations are so rare?
What will be an ideal response?