Which type of mutation is the most common? a. insertion of one or more bases b.

Question

Which type of mutation is the most common? a. insertion of one or more bases b. depletion of one of more bases c. base substitutions d. inversion of DNA segments duplications of DNA segments Which of the following statements about mutations is not true? a. Mutations occur in all organisms at the same rate. b. DNA polymerase never produces mutations during replication because of the proofreading ability of this enzyme. c. Mutations often occur at methylated cytosine residues. d. Mutations such as duplications or deletions occur due to repetitive sequences causing strand slippage. e. When comparing mutation rates to coding capacity, mutation rates are usually the same for most organisms, which suggests a mechanism to control the rate. Which one of the following is often used to establish family trees for organisms because it is present in all organisms and does not accumulate mutations quickly? a. rRNA b. fibrinopeptides c. hemoglobin d. chloroplasts e. mitochondrial DNA Which of the following statements about DNA microarrays is not correct? a. Fluorescently labeled mRNA from the organism hybridizes to the DNA on the glass slide. b. DNA microarrays contain thousands of DNA segments on a support, such as a glass slide. e. Hybridization to a DNA microarray can only occur once. b. The amount of fluorescence correlates with the amount of mRNA in the sample. c. The data obtained from DNA microarrays represents a global view of gene expression, even under particular growth conditions. What is the term used to describe the process of synthesizing oligonucleotides directly on the glass slide? a. Photosynthesis b. Photolithography c. light-activated oligosynthesis d. on-chip oligosynthesis e. Protected oligosynthesis

Explanation / Answer

Ans.8. base substitu is the most common type of mutation.

Ans.9. Mutation occurs in all organisms at the sameis not correct.

Ans. 10. rRNA

Ans. 11 Hybridization to a DNA microarray can occur once is not correct.

Ans. 12. On-chip oligosynthesis.

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