4,064 Answered Questions for the topic biology

09/24/20

E. coli antibiotic
Hi!I wonder if Streptomycin is effective for E.coli infections?Some sources say yes, others say that it enhances its growth.Which one is true?Thanks!
Follows • 1
Expert Answers •1

09/24/20

Inhibition zone
Hi!I did a Kirby-Bauer lab seeing antibiotic resistance in E.coli. I have measured the inhibition zones, but I am not sure how to confirm if it is large enough to be considered not resistant or... more
Follows • 1
Expert Answers •1
Biology Microbiology

09/24/20

Ampicillin effect
Hi! I wonder of Ampicillin kills bacteria and if I am right:It kills it by preventing the cell wall to be built up and when the bacteria cell will divide, there is no cell wall to hold it together... more
Follows • 1
Expert Answers •1

09/24/20

All antibody based methods to quantify protein levels are so specific you don’t need controls?
True or false?I think its true since we need controls to determine certain methods?
Follows • 2
Expert Answers •1
Biology Immunology

09/24/20

An EMSA can be used to determine if a transcription factor is bound to DNA?
true or false?I think its true since EMSA is similar to Elisa where its also an enzyme and is bound to DNA.
Follows • 1
Expert Answers •1

09/23/20

Need help with biology

How are the daily energy needs between a lion and zebra different?
Follows • 1
Expert Answers •1
Biology

09/22/20

How do you tell if a mutation is on the X chromosome?
Follows • 2
Expert Answers •1
Biology

09/22/20

Is there a human version gene of the purple eye colored in a drosphilla or fruit fly? What function does the human version serve?
Follows • 2
Expert Answers •1
Biology

09/22/20

Is the mutation in the gene in the TATAAA box or the promoter and why?
Follows • 2
Expert Answers •1
Biology

09/22/20

What does the purple eye color mutant allele do in a fruit fly drosphilla?
Follows • 0
Expert Answers •1
Biology

09/22/20

urget please help

 2.  When a solution has a lot of hydrogen ions( H+) it is considered to be a___________
Follows • 2
Expert Answers •2
Biology

09/22/20

What parts of the world do we see salinity readings greater than 36 parts per thousand?

urget please help me please
Follows • 2
Expert Answers •2
Biology

09/22/20

What parts of the world do we see salinity readings greater than 36 parts per thousand?

please help me please thank you to whoever helps me
Follows • 2
Expert Answers •1
Biology

09/21/20

What parts of the world do we see salinity readings greater than 36 parts per thousand?

What parts of the world do we see salinity readings greater than 36 parts per thousand? 
Follows • 1
Expert Answers •1
Biology

09/21/20

Relatively warm low-density surface waters are separated from cool, high density deep waters by the

Relatively warm low-density surface waters are separated from cool, high density deep waters by the what ?
Follows • 1
Expert Answers •1
Biology

09/21/20

xBased on the law of constant proportions if you have one kilogram of seawater with an average salinity of 35 PPT the dissolved solids in that one kilogram sample shoul
Based on the law of constant proportions if you have one kilogram of seawater with an average salinity of 35 PPT the dissolved solids in that one kilogram sample should be proportional to each... more
Follows • 2
Expert Answers •1

09/21/20

I need help with biology

Where does a lion get most of its energy from? Where does an elephant get most of its energy from?
Follows • 1
Expert Answers •1
Biology

09/20/20

Urgent! Can someone please answer these questions? Thank you for your time!
Changing environmental conditions, such as temperature or pH, can affect enzyme shape. How would this alter the enzyme's function? Food contains large, complex molecules that cannot be easily... more
Follows • 0
Expert Answers •1

09/17/20

Need help with answering a biology question

Do individual animals have the same dietary needs every single day of the year? Why or why not?
Follows • 2
Expert Answers •2
Biology

09/17/20

Calculate the genotype and allele frequencies. What would be the expected genotype frequencies if this population were in genetic equilibrium?

A population with 600 members has the following genotypic profile: AA= 350, Aa= 100, aa= 150.
Follows • 1
Expert Answers •1
Biology Ap Biology

09/17/20

AP Biology Question
A researcher hypothesizes that a certain chemical reaction performed by cells is a polymerization reaction. To study this reaction in more detail, she replicates the reaction in a test tube.What... more
Follows • 1
Expert Answers •1

09/16/20

Quantifying Stains For Science Fair Project
I'm planning on making a science fair topic about which homemade stain remover works best. However, I need a way to quantify the stains. I heard about ImageJ but my Mac doesn't let me download it... more
Follows • 1
Expert Answers •2

09/15/20

Is the deduction that codes require "coders" a rational deduction that can be made, or is it simply "religion" masquerading as science?
Follows • 2
Expert Answers •2

09/15/20

How is historical science different than benchtop science?
Follows • 1
Expert Answers •1
Biology

09/15/20

EMERGENCY HELP NEEDED PLZZZZ
______ emerged from traditions including Greco-Roman philosophy.A cell theoryB biological sciencesC molecular biology______ was recognized as a professional scientific discipline by the nineteenth... more
Follows • 1
Expert Answers •1

Still looking for help? Get the right answer, fast.

Ask a question for free

Get a free answer to a quick problem.
Most questions answered within 4 hours.

OR

Find an Online Tutor Now

Choose an expert and meet online. No packages or subscriptions, pay only for the time you need.