chap 1 microbio

An amino acid contains all of the following except

a nitrogen base.

Which of the following is not a pyrimidine?

adenine

The building blocks of an enzyme are

amino acids.

Scientists today utilize microorganisms to breakdown toxic chemicals in our environment. The decomposition of pollutants by microbes is referred to as

bioremediation

Using microbes to detoxify a site contaminated with heavy metals is an example of

bioremediation.

Which pertains to DNA but not to RNA?

contains thymine

Which amino acid contains sulfur atoms that form covalent disulfide bonds in its tertiary structure?

cysteine

The structure of proteins is complex and unique, and only specific molecules can interact with their surface features. The natural shape of each protein is termed the native state. When proteins are exposed to heat, acid, or alcohol, their shape is disrupted and they become nonfunctional or

denatures

A scientist studying the sequence of nucleotides in the rRNA of a bacterial species is working on

determining evolutionary relatedness.

When humans manipulate the genes of microorganisms the process is called

genetic engineering.

The purine___ always binds with the pyrimidine__ in DNA and RNA

guanine, cytosine

Polar molecules

have an unequal charge distribution.

A student forgot to label a beaker containing a DNA solution and a beaker containing a glucose solution. If chemical analysis was performed to identify the contents of each beaker, which of the following would be found in the beaker of DNA but not in the beaker with glucose?

nitrogen and phosphorus

Viruses may also be carried from patient to patient transmitting disease, even though they differ from bacteria in that they are

noncellular particles.

Purines and pyrimidines are components in the building block units of all

nucleic acids.

The lipid group that is the major component of cell membranes is the

phospholipids.

The study of evolutionary relationships among organisms is called

phylogeny

Which of the following would have glycosidic bonds?

polysaccharides

54. All of the following are polysaccharides except

prostaglandins in inflammation.

Scientists use microbes to produce drugs, hormones, and enzymes. This type of biotechnology involves the transfer of foreign genetic material into a microbe, a process called

recombinant DNA technology

The alpha helix is a type of _____ protein structure.

secondary

Which scientific field is involved in the identification, classification, and naming of organisms?

taxonomy

The lipid group that serves as energy storage molecules is

triglycerides.