Which of the folllowing terms refers to a bacterial cell having a single tuft of flagella at one end?
A. monotrichous
B. amphitrichous
C. peritrichous
D. lophotrichous
Answer: D. lophotrichous
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In which organism is a beta-barrel folding domain most likely to be found?
A. Homo sapiens B. Drosophila melanogaster C. Escherichia coli D. Caenorhabditis elegans E. Saccharomyces cerevisiae
RNA is ____ and contains the nitrogenous base ____, which is absent in DNA
a. single-stranded; thymine b. double-stranded; uracil c. single-stranded; uracil d. double-stranded; thymine e. single-stranded; cytosine
Why are individuals who are heterozygous for the cystic fibrosis allele unaffected by the disease?
a. They make enough of a particular protein to allow their cells to work properly b. They have an extra copy of the allele on their X chromosome c. Cystic fibrosis only occurs in males, so females are unaffected d. Their cells can transport chloride ions through diffusion channels
In your research, you are comparing the transcriptome and the proteome for two related species. One gene in species B has a similar transcript but a much smaller protein than in species A, and the protein seems to be nonfunctional. What do you predict about this gene? (Select all that apply)A) It is a pseudogene.B) It will have an increased number of persistant mutations in species B.C) It probably has a stop codon early in the coding region.D) It probably has a defect in the enhancer region.E) It probably is not methylated correctly.
What will be an ideal response?