Which of the following statements about the human genome is false?
A: Protein coding regions make up less than 2% of the human genome sequence.
B: Human genes generally have many large introns.
C: Over 50% of the genome is comprised of transposons and other repetitive sequences.
D: The human genome is unique in structure and composition when compared to any other organism.
Answer: D: The human genome is unique in structure and composition when compared to any other organism.
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The pathway leading to the perception of sound by mammals begins with the _____
A) hair cells of the organ of Corti, which rests on the basilar membrane, coming in contact with the tectorial membrane B) hair cells of the organ of Corti, which rests on the tympanic membrane, coming in contact with the tectorial membrane C) hair cells of the organ of Corti, which rests on the tectorial membrane, coming in contact with the basilar membrane D) hair cells of the organ of Corti coming in contact with the tectorial membrane as a result of fluid waves in the cochlea causing vibrations in the round window E) hair cells on the tympanic membrane that stimulate the tectorial membrane neurons, leading to the auditory section of the brain
The pair of sister-chromatids, formed by replication of a chromosome, are held together at a specific region of the chromosome called the:
A. replication fork. B. telomere. C. centromere. D. centriole. E. origin.
Which of the following cells would most likely hav the greatest concentration of densely packed rough endoplasmic reticulum?
A. An amoeba engulfing small ciliates B. A bioluminescent bacterial cell C. A pancreatic cell engaged in the production of digestive enzymes D. A functional phloem cell at maturity E. An epithelial cell whose DNA is replicating before mitosis
Which of the following statements about the consequences of global warming are true? (Check all that apply.)A) The rate of global warming may be too great for populations to be able to adapt through natural selection.B) Rising sea levels will be a consequence of global warming.C) Global warming will cause a decrease in the incidence of diseases caused by mosquitoes.D) The frequency of El Niño events may increase as a consequence of global warming.E) Agricultural production will increase.
What will be an ideal response?