Exam 28: Prokaryotes

The data below shows recombination of genes (1-5) according to the amount of time available for transfer of the bacterial chromosome during conjugation between different genetic strains in E coli.Based on these data, which gene is closest to gene 1? (Note: The entire chromosome is transferred in 100 minutes.)

Prokaryotes are very important ecologically because of their involvement in all of the following except

Why is chlamydia much more common than syphilis?

Are transformation and transduction the same process?

Why are children often told that if they eat too much candy their teeth will fall out?

If the label on a slide reads Gram-positive bacillus, what would a students expect to see?

A microbiologist explains to one of her biology classes that her research focuses on the nucleoid region of the cholera bacteria.This means that she is studying a region within the bacterium that contains the

Cell walls of bacteria (domain Bacteria) usually consist of _____________, a network of polysaccharide molecules connected by polypeptide cross-links.

Phil has chronic ulcers, he has been taking acid blockers and drinking vast amounts of liquid antacids.These help relieve the symptoms but he still suffers from ulcers.What would be the best course of action to treat the source of his ulcers?

Which of the following statements about Hfr cells and bacterial conjugation is false?

Which of the following is not a shape seen in prokaryotes?

Farmers often practice crop rotation to help enrich agricultural fields.Why are beans and other legumes often used in the rotations?

Plasmids are distinguished from bacterial chromosomes in that

Prokaryotes that harvest both energy and carbon atoms from organic molecules are called

Many cells of the immune system have receptors that detect peptidoglycans and lipopolysaccharides.How do pathogenic bacteria avoid detection?

An oil spill occurs, and Greg (a member of the clean up team) suggests adding fertilizer.Why is he making this suggestion?

A researcher observed a reduction in the number of chromosomes during cell division for a microbe, he concludes that the microbe must be

Some prokaryotes attach to other substrates by hairlike outgrowths, which are shorter than flagella.These are called

Bacterial sexually transmitted diseases include all of the following except

A bacterium is found that can photosynthesize in the presence of light but uses hydrogen sulfide and releases elemental sulfur as a bi-product.This organism can best be classified as a