Ask Question, Ask an Expert

+1-415-315-9853

info@mywordsolution.com

Ask Biology Expert

1) What are osmophilic (or halophilic) organisms
a) Microorganisms that require low pH for growth.
b) Microorganisms that can't perform osmosis.
c) Microorganisms that require the presence of a low solute concentration.
d) Microorganisms that are able to grow in the presence of a high solute concentration.

2) What is the mechanism behind the action of UV light on microorganisms?
a) It promotes chemical and physical changes in nucleic acids and proteins.
b) It stops bacterial endospore formation.
C) It causes dehydration of the cell
D) It causes osmotic lysis

3) What is the activity of plain soap to prevent transmission of infectious disease?
A) Soap is positively charged and acts to disrupt membranes of bacteria.
B) Soap creates reactive oxygen species to disrupt cellular functions
C) Soap binds to nucleic acids to create thymine dimers
D) Soap acts as a degerming agent to remove oil and surface microbes

4) Often the number of bacteria isolated off of hands after hand washing actually INCREASES with more washes. Why?
A) Because washing stimulates rapid bacterial growth.
B) Because hand washing doesn't work to remove bacteria.
C) Because the soap or hand sanitizer is contaminated.

D) Because you begin to remove resident flora after several washes
5) Which organism is the most resistant to the lethal effects of ultraviolet light?
A) A protozoan that does not form cysts
B) A spore-forming bacteria
C) A virus
D) A gram negative bacteria
6) Since 70% alcohol acts to denature proteins, but this action takes time. What are we really accomplishing by swabbing a patient prior to hypodermic needle injection?
A) Killing of all surface bacteria
B) Cleaning the area and removal of some surface bacteria.
C) Contamination of the injection site with pathogens
D) Complete sterilization of the injection site 

Biology, Academics

  • Category:- Biology
  • Reference No.:- M943371

Have any Question? 


Related Questions in Biology

Due to the prospect of interplanetary travel how would you

Due to the prospect of interplanetary travel, how would you attempt to  Isolate  and  identify  a bacterial infection acquired on another planet. This bacteria is unknown to use and does not appear in  Bergey's  or the  ...

1 uterine contractions that are irregular and brief that

1) Uterine contractions that are irregular and brief that occur toward the end of gestation are called ________. 2) The hollow cavity within the blastocyst is the ________. 3) The process by which a viable embryo is form ...

Three questions with cited references1 describe how social

Three questions with cited references... 1. Describe how social and environmental factors impact human behavior. 2. Describe two-three causes of death related to human behavior. Have the governments' interventions been e ...

Please help me with these questions1 describe how sex is

Please Help me with these questions: 1. Describe how sex is determined in humans 2. Describe what sex linkage is and give an example 3. Define dosage compensation. 4. Define nondisjunction and describe a scenario in whic ...

If human activity or natural activity hurricanes destroys a

If human activity or natural activity (hurricanes) destroys a certain species, what consequence might this have on the environment?

Do cofilin and profilin increase of decrease the critical

Do Cofilin and profilin increase of decrease the critical concentration of actin polymerization?

Write 2 differences between monocot and eudicot

Write 2 differences between monocot and eudicot angiosperms.

Lab reportthe purpose of a biology lab report is to

Lab Report The purpose of a Biology lab report is to describe and analyze a laboratory experiment that explores a scientific concept so that other scientists might be able to replicate the experiment and investigate the ...

A man and a woman both have polydactyly ie six fingers on

A man and a woman both have polydactyly (i.e., six fingers on each hand), a trait which is determined in this example by a single gene. They have four children, none of whom have polydactyly. What is the probability thei ...

What percentage of the dna changes that occur and one cell

What percentage of the DNA changes that occur and one cell in one year escape the proofreading and repair process calculate this in both cases: if one mutation accumulates in one sale per year and if five mutations accum ...

  • 4,153,160 Questions Asked
  • 13,132 Experts
  • 2,558,936 Questions Answered

Ask Experts for help!!

Looking for Assignment Help?

Start excelling in your Courses, Get help with Assignment

Write us your full requirement for evaluation and you will receive response within 20 minutes turnaround time.

Ask Now Help with Problems, Get a Best Answer

WalMart Identification of theory and critical discussion

Drawing on the prescribed text and/or relevant academic literature, produce a paper which discusses the nature of group

Section onea in an atwood machine suppose two objects of

SECTION ONE (a) In an Atwood Machine, suppose two objects of unequal mass are hung vertically over a frictionless

Part 1you work in hr for a company that operates a factory

Part 1: You work in HR for a company that operates a factory manufacturing fiberglass. There are several hundred empl

Details on advanced accounting paperthis paper is intended

DETAILS ON ADVANCED ACCOUNTING PAPER This paper is intended for students to apply the theoretical knowledge around ac

Create a provider database and related reports and queries

Create a provider database and related reports and queries to capture contact information for potential PC component pro