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

Biology & Microbiology

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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

Biology & Microbiology

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

Biology & Microbiology

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

Biology & Microbiology

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?

Biology & Microbiology