Final Practice Questions True /False

Bacterial growth refers is to an increase in the numbers of cells in a bacterial culture

True

Bacteria usually possess multiple chromosomes

False

The insertion of a transposed into a DNA sequence will result in formation of base substitution mutations in a cells DNA

False

Cell to cell contact is required tor transduction to occur

False

The term biotechnology refers exclusively to the use of generally engineered organisms to produce desired products

False

Most cells can take up DNA from their surroundings without chemical treatment

False

One of the first commercial accomplishments of recombinant DNA technology was the production of human insulin using genetically engineered E. Coil.

True

The insect vectors have six legs and include spiders ticks mosquitoes, and lice

False

Bacteria usually contain multiple chromosomes

False

Both base substitution and frameshift mutations can result in the formation of premature stop codons

True

In the Ames test, any colonies that form on the control plates, in the absence of chemical bring tested, should be the result of spontaneous mutations

True

Cell to cell contact is required for transduction to occur

False

Recombination will always alter a cell genotype

False

Desiccation is a reliable form of sterilization

False

Moist heat destroys organisms by denaturing proteins

True

Ultraviolet light causes irreversible breaks in DNA stands

True

Autoclaving is the most effective method of moist heat sterilization

True

Microorganisms placed in high concentrations of salts and sugars undergo lysis

False

Bacterial growth refers to an increase in the numbers of cells in a bacterial culture

True

Gelahn is used at a solidifying agent in microbiological media since few bacteria can degrade it

False

In performing a ten-fold dilutions series from a simple containing 10,000 bacteria per milliliter, the fourth tube in the dilution series will have lo cells per milliliter

False

Nitrogen fixing bacteria such as Cyanobacteria can use atmospheric nitrogen for their nitrogen source

True

The pentose phosphate pathway can be characterized as an anabolic pathway

False

Glycolysis is utilized by cells in both respiration and termentahon

True

An apoenzyme that loses its coenzyme subunit will be non-functional

True

The cell walls of bacteria are responsible for the shape of the bacteria and the difference in the gram stain reaction

True

Endosperm are a reproductive structure

False

Many enzymes in both prokaryotic and eukaryotic cans are compurtmentalized within organelles

False

If you observe rod-shaped red cells after the gram stain, you can assume their cells walis contain endotoxin

True