4,064 Answered Questions for the topic biology

05/26/21

If you were doing recombinant DNA with animals, why would you include a gene for GFP (green fluorescent protein) rather than AMP (ampicillin resistant)?
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Biology Math Science

05/26/21

answer these below please! copy and paste the image links into your browser for refrences!
Hemophilia is a sex-linked trait. The gene for Hemophilia is recessive and found on the X chromosome. The pedigree below tracks hemophilia through generations of a family. What is the genotype of... more
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05/26/21

Chemistry question please if anyone can help I really need it
___NH3+___O2----> ____ NO +____H2O In an experiment 5.03g of NH3 are allowed to react with 8.78g of O2 . Write the formula of the limiting reagent ANSWER ____ 2 How many grams of NO are formed... more
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05/25/21

Help me with gas chemistry please

A balloon has a volume of 150 mL. If the pressure is kept constant, while the temperature is halved, the volume of the balloon:A. Will also be doubledB. Will be halved   C.  Will be squaredD. Will... more
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05/25/21

please help me with the gas laws in chemistry

Which of the following is true if the temperature of the gas in a cylinder is increased, while the number of moles of gas and volume of the container remains the same? Select all that apply.A.... more
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05/25/21

please hep me with this math problem of gas laws for chemistry

A sample of sulfur hexafluoride gas occupies 5.84 L at 198°C. Assuming the pressure remains constant, what temperature (in °C) is needed to reduce the volume to 2.83 L? Answer in units of °C
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05/25/21

Help me with gas laws in chemistry with math
A 75 L sample of dry air cools from 147°C to -37°C while the pressure is maintained at 2.85 atm. What is the final volume?Answer in units of  L
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05/25/21

please help me with gas laws of chemistry

Calculate the temperature of an argon sample at 55.4 kPa and 18.6 L if it occupies 25.8 L at 75.0°C and 41.1 kPa.A. 65.2°CB.77.2°C     C. 95.0°CD. 72.9°CE. 85.1°C
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Biology

05/25/21

What are the dependent, independent, and control variables in protein synthesis?
I'm doing a lab report and I can't figure out what the variable should be.
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Biology

05/24/21

Which of the following is an example of a transcription factor?
a.The ligand signaling of a G protein. b.The ligand signaling of a channel protein . c.The creation of cAMP in signal transduction. d.The positive feedback loop as a result of the SrY gene.
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05/24/21

Using EcoRI, which cuts at 5' GAATTC 3', indicate how many strands would be produced?
5’ A G A A T T C G C T T A A G T C G A C G T A A G C C G G A A T T C C A T T C G A A T T A G 3’ 3’ T C T T A A G C G A A T T C A G C T G C A T T C G G C C T T A A G G T A A G C T T A A T C 5’ Using... more
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05/24/21

chemistry question

2.  How many grams of water can be produced with 60 grams of sulfuric acid and 200 grams of sodium hydroxide? Which reactant is limiting? How many grams of the excess reactant will be left after... more
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Biology

05/24/21

Final exam Score

if I get a 50 on my final exam which is worth 20% of my grade and my grade right now is a 86 , would I fail the class ?
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05/22/21

I need help solving with jules. Please and thank you!
40g of water is placed in a calorimeter at an initial temperature of 20.2˚C. After the addition of a sample of warm metal, the final temperature of the water is 23.6˚C. How much heat did the water... more
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05/22/21

I need help solving this question. Please and thank you!
A 12g sample of hot metal is placed in a calorimeter with a known mass of water. It is determined that the metal releases -50J of heat in the process. The change in temperature of the metal (∆T) is... more
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05/21/21

I DONT UNDERSTAND . NEED HELP

WOULD THE ANSWER BE METHANE??  On Monday, they asked their teacher about how it is possible to have so many different types of stuff from only 100 elements. Mrs. Morris, Julie’s teacher, said they... more
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05/21/21

good explanation needed!

ANSWER WOULD BE B CORRECT ?Her teacher asked her which of the following substances is not made of atoms? *Option 1Option 4Option 3
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Biology Science Chemistry

05/21/21

science help needed

Julie noticed on the campout that Terry’s face had darkened from the sun. She learned that every time we are out in the sun, our bodies make Vitamin D. The Vitamin D made by the body is considered... more
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05/21/21

good explanation needed! im confused

 Gummy Worms are a synthetic material, made when two chemicals, sodium alginate and calcium chloride, are mixed and allowed to react. Sodium alginate is isolated from seaweed. The other ingredient,... more
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05/21/21

good explanation needed i need help

A person claims that aspirin is not “natural” and refuses to use it to relieve their pain. Which of the statements best refutes (argues against) this person’s claim? Aspirin has been used to... more
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05/21/21

I dont understand ! i need help with explanation on what to do.
Mrs. Morris also found the two models below in the closet. Look closely at the models of two solids as shown below. Using your knowledge and correct terminology of the composition of matter,... more
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05/20/21

If anyone could help me out that would be amazing,with hemi
What is the greatest amount of sodium chloride in moles that can be made with 13 grams copper II chloride and 15 grams sodium nitrate? Which reactant is limiting? How many moles of the excess... more
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05/20/21

Chemistry question

What is the greatest amount of sodium chloride in moles that can be made with 13 grams copper II chloride and 15 grams sodium nitrate? Which reactant is limiting? How many moles of the excess... more
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05/20/21

You need to make a 500 mL of 5M NaCl solution. How many grams of NaCl do you need? please i need help i need this to pass a quiz to graduate high school
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Biology Physiology

05/20/21

What type of muscle contraction moves food down the esophagus?
Why is this contraction important?
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