BIOL 2420 Exam 1

get a hint

hint

All of the following are correct about prokaryotes, except

All of the following are correct about prokaryotes, except

They has organelles

The DNA of microorganism is made up of subunits called

Nucleotides

A covalent bond is formed between an anion and a cation

False

All microorganisms are parasites

False

Cations are

Capable of forming ionic bonds with anions

Water molecules are nonpolar molecules.

False

The alpha helix and beta pleated sheet are examples of

Secondary structures

How many times more acidic is a solution with a pH of 3 than a solution with a pH of 6?

1000

A halophile would grow best in

Salt lakes

Two or more atoms bonded together are called a/an

Molecules

Which term does not belong in this list?

pH 8

In a commensal relationship, the commensal benefits but the cohabitant is neither harmed nor benefited.

True

If solution A has a lower pH compared to solution B, then solution A is more acidic than solution B.

False

Which of the following are not considered microorganisms?

Mosquitoes

In ___ conditions, the cell wall will help prevent the cell from bursting.

Hypotonic

What do H20, Nacl, CO2 and HCI all have In common?

All are inorganic

When whole cells or large molecules in solution are engulfed by a cell, this endocytosis is specifically termed

Phagocytosis

A weak, attractive force between nearby molecules is called a/an

Hydrogen bond

Among the microorganisms, various genomes can include

All of the choices are correct (Chromosomes, , Mitochondrial ,DNA )

The building blocks of an enzyme are

Amino acids

The movement of molecules from an area of high concentration to an area of lower concentration is called

Diffusion

The study of evolutionary relationships among organisms is called

Phylogeny

ATP is best described as

The energy molecule of cells

Polar molecules are composed of covalently bonded

Atoms of different electronegativity

The E. coli that normally live in the human large intestines and produce vitamin K that the body uses would be best termed a ___ relationship

Mutualistic

A scientist studying helminths is working with bacteria

False

After binary fission, daughter's cells will differ genetically

False

The microorganisms that do not have a nucleus in their cells are called

Prokaryotes

Which of the following is not true of an organism's genotype?

Are the expressed traits governed by the genes

What part of a phospholipid forms hydrophobic tails?

Fatty acids

An organism with a temperature growth ranges of 45O C to 60O C would be called a(n)

Thermophile

The smallest and most significant classification is

Species

What compound has the highest concentration in a cell?

H2O

Cultures of a bacterial species were incubated on the shelf of a refrigerator, out on a lab bench top, on the shelf of a 37° C incubator and on the shelf of a 50° C incubator. After incubation, there was no growth at 37° C and 50° C, slight growth out on the bench top and abundant growth at refrigeration. What term could be used for this species?

Psychrophile

The term autotroph refers to an organism that

Uses CO, for its carbon source

Which of the following represents a synthesis reaction?

A + B AB

Nucleic acids have primary, secondary, tertiary, and quaternary levels of organization.

False

All microorganisms are best defined as organisms that

are too small to be seen with the unaided eye

Organism called ___ live on or in the body of the host and cause some degree of harm

Pathogens

An organism that can use gases oxygen in metabolism and has the enzymes to process toxic oxygen products is a(n)

Aerobe

The term chemotroph refers to an organism that

Gets energy by oxidizing chemical compounds

Disease causing microorganism are called

Pathogens

All mutations are harmful to the cell.

False

Each ____ is a specific segment of the DNA with the code for production of one functional product.

Gene

Microorganisms require large quantities of this nutrient for use in cell structures and metabolism

Macronutrients

Which process involves the deliberate alteration of an organism's genetic material?

Genetic engineering

How would you categorize a virus?

None of the above (NOT prokaryotic, eukaryotic, and archaea)

Proteins are synthesized by linking amino acids with _____ bonds.

Peptide

An obligate halophile requires high ______.

Salt

Which of the following characteristic is not true of a plasmid?

It is required for normal cell function