A "pseudogene" is best defined as:
a. a DNA sequence which is not itself expressed, but which has a functional homologous sequence in a related species.
b. a DNA sequence that encodes a functional gene, but lacks a promoter region.
c. a DNA sequence that arose from a duplication of a functional gene, but which itself is not expressed.
d. a gene that is no longer expressed due to a point mutation.
e. a coding sequence that was mutated due to chromosomal non-disjunction during meiosis.
Ans: c. a DNA sequence that arose from a duplication of a functional gene, but which itself is not expressed.
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The proteome is all the proteins produced by an organism. The genome is the totality of all genes of an organism. If the proteome is much larger than the genome, which of the following statements would be accurate?
A) This finding lends support to the one-gene, one-enzyme hypothesis. B) The number of monomeric subunits found in proteins is fewer than the number of monomeric subunits found in genes. C) At least in some cases, a single gene must code for more than one protein. D) Noncoding DNA is important in determining the proteome.
The extracellular matrix contains
A. collagen. B. cartilage. C. smooth muscle. D. carbohydrates. E. both collagen and carbohydrates.
Triglycerides are composed of three fatty acids attached to a molecule of ________.
Fill in the blank(s) with the appropriate word(s).
What is the relationship between genes and chromosomes?
A) Genes are the proteins around which DNA chromosomes are packaged. B) Chromosomes are proteins that carry genes made of DNA. C) A chromosome is a DNA molecule with many genes. D) Genes are the proteins encoded by chromosomes.