Answers created by Dave

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• How many significant figure should be present in 600?
  
• Chemical bond that provides stability to complex carbohydrate molecule ? A: carbon-hydrogen bond B: carbon-oxygen bond C: carbon-nitrogen bond
  
• What is a 'gas constant'?
  
• How does your body know how to put the amino acids together in order to make a protein?
  
• Why are reverse and forward primers required for the polymerase chain reaction of genomic DNA?
  
• How does acyclovir prevent viral replication?
  
• Among the following mixtures,dipole dipole as the major interaction is present in? a)KCl and water b)C6H6 and CCl4 c)C6H6 and C2H5OH d)acetonitrile and acetone
  
• Can I please get an example of how humidity affects evaporation?
  
• What is the mass of water vapor that condenses near the surface of the Earth?
  
• How can a saturated solution be prepared?
  
• What intermolecular forces are present in alcohol?
  
• When Uranium-238 decays, what does it decay into?
  
• What gel electrophoresis shows about DNA?
  
• How can Boyle's law be applied to everyday life?
  
• How do lipids help the body?
  
• What structural component is found in DNA but not in RNA?
  
• How would the structure of a fish's DNA compare with the structure of a lion's DNA?
  
• How are chemical reactions involved in the transformation of matter?
  
• At what temperature does butter freeze on Earth and also, the Moon? Thanks...
  
• When butter is heated melts, and when that melted butter cools and solidifies what is the process called?
  
• The details are in the picture How would I find the mass of helium required?
  
• What is the relationship between solubility and precipitation?
  
• How does dna differ in eukaryotic and prokaryotic cells?
  
• In gene cloning, both gene and plasmid vectors are digested by ECOR1 and treated in the presence of ligase. What will be the product?
  
• Why are cells important to biology?
  
• Can someone help me with this question ??
  
• Can someone help me with this plz?
  
• If you have a restriction enzyme that cuts a piece of DNA at two recognition sites, how many DNA fragments would you see on a gel?
  
• A protein is phosphorylated at a serine residue. A phosphomimic mutant of the protien can be generated by substituting that serine with?- a. Glycine b. Alanine c. Aspartate d. Threonine
  
• Which type of mutation causes Down syndrome?
  
• Why is it essential that the same restriction enzyme be used to cleave (cut) the DNA of both organisms used to create a transgenic organism?
  
• How are glucose and starch related?
  
• Since the mRNA codons correspond to DNA codons and tRNA codons correspond to mRNA codons, is there any difference between a DNA sequence and a tRNA sequence other than the substitution of Thymine with Uracil?
  
• What is the difference between RNA and DNA?
  
• What is the elemental composition of lipids?
  
• How do lipids differ from other macromolecules?
  
• Are antigens glycoproteins?
  
• How is recombinant DNA made?
  
• Why are enzymes specific to certain substrates?
  
• Determine the number of electron groups around the central atom for each of the following molecules?
  
• Electron pair structure and molecular pair geometry of dim ethyl ether?
  
• Convert heat of combustion of kerosene jet fuel to kJ/mol kerosene?
  
• How is retrovirus replication different from normal DNA viruses?
  
• A DNA molecule has ______ new strand and ________ old strand. .?
  
• Why ribosomes dont have a membrane ?
  
• Why do different proteins contain a different number and a different sequence of amino acids?
  
• Determine the maximum amount of AgCl (Ksp= 1.8 x 10^-10) that can be dissolved in 250 ml of a 0.0100 M solution of NaCl?
  
• What is the phosphodiester bond and how is it drawn?
  
• How can molecular biologists identify genes in sequences of DNA?
  
• 1-propanol boils at 97°C, while 2 propanol boils at 87.5°C. What would account for this difference in boiling point?
  
• Polypeptide is both hydrophilic and hydrophobic. What will happen when it is added to water?
  
• What parts of cells contain DNA?
  
• How do I calculate the mass in grams for each of the following?
  
• How do amino acids affect enzymes?
  
• How do the structures of proteins differ from the structures of carbohydrates?
  
• If the sequence of bases in DNA is TAC, then the sequence of bases in mRNA will be?
  
• What is an alkane?
  
• How many single covalent bonds are in carbon?
  
• How do nucleotides form a double helix?
  
• What is the function of STOP CODON?
  
• What are the steps involved in cloning a gene?
  
• Complete the chemical reaction that occurs when dimethylamine (CH3)2NH reacts with water?
  
• How do you solve nuclear reaction equations?
  
• What type of radiation does a CT scan use?
  
• What is the pH of a solution made by dissolving 5.36 grams of calcium fluoride in enough water to make 430 mL of solution? The Ka for HF is 6.8x10–4.
  
• Anyone have an idea about this chemistry problem?
  
• What happens if you heat a ligase?
  
• What is the oxidation number for Mo, Co, and Ne?
  
• I understand you compare Ka values to determine the pH but this order just seems to be all over the place? HCl: strong acid so low pH C6H5NH3Cl: Ka=1.35x10^-5 NH4+ Ka=5.56x10^-10 MgCl2=neutral HClO2Ka=1.2x10^-2 HOCl Ka=4.0x10^-8
  
• What would happen if our cell did not divide?
  
• Do prunes in our hands and feet not an example of osmosis?
  
• What is the pH of the resulting solution?
  
• Which compound is INSOLUBLE in water? 1. potassium nitrate 2. calcium carbonate 3. sodium carbonate 4. ammonium chloride
  
• HELP WITH HOMEWORK! What would happen to Blood cells in the following solutions?
  
• Do carbohydrates have amino groups?
  
• How do hydrophobic amino acids and hydrophilic amino acids cause proteins to have a specific shape?
  
• What are some examples of eukaryotic cells?
  
• Which part of a fatty acid is hydrophilic?
  
• Describe a condition where we could find water in liquid form where temperatures exceed 100C?
  
• What is osmosis?
  
• Where can common bacteria be found ?
  
• How many grams of calcium nitrate are needed to make 3.30L of a 0.10 M solution?
  
• If 35.0mL of ethanol,C2H5OH, were added to 65.0mL of water, what is the percent by volume of the solution?
  
• During protein synthesis in eukaryotes, what happens during RNA splicing?
  
• When we introduce a "single "transgene in the body then can this one gene can replace the function of the defected gene ,as this defected gene might be present in all body cells?
  
• What is the most common molecule in living things?
  
• Why does Le Chatelier's principle work?
  
• What does the first word in a two-word name of an organism identify?
  
• What do you mean by polysomes? I have read this in zoology monera feature that " ribosome 70s type often arrange in polysome" explain
  
• If you were to view DNA under the classroom microscope would you be able to see any of the fine detail of the double helix structure? Why or Why not?
  
• What is the final electron acceptor molecule in the electron transport chain during cell respiration if the process is aerobic?
  
• Why is air a form of matter?
  
• Compare the sex cells produced by meiosis to the parent cell. Why is the difference between the sex cells and parents cell important?
  
• When naming ionic compounds, when is '-ate' used instead of '-ide'?
  
• What is nuclear waste half life?
  
• If the sequence on a strand of a DNA molecule is C C C A C G T C T, what will the mRNA sequence from this DNA molecule be?
  
• The uv rays in stratosphere break the cfc into chlorine atoms.chlorine reacts with ozone and breaks into oxygen.as oxygen is helpful to man.why it is harmful?
  
• What would be the correct formula of a ionic compound formed if a certain metal M with valence electron configuration Ns2 reacted with a nonmetal valence electron Ns2Np4?
  
• Is it possible for a nuclear power plant to experience a nuclear explosion?
  
• How do enzymes manipulate the collision theory of chemistry?
  
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