71 Answered Questions for the topic AP biology
What data does a sequencing chromatogram give??
For my lab we had to change the sequencing of Erv26 depending on our primer. We change the amino acid T69 from AAA to AUA. This is one of our figures but i am unsure how to interpret the data.
Su and Ki results for the genotype and phenotype ratios for the hi and ahh cross were very different from the class ratios for the hh and Hh cross. What might account for this?
When proteins are not reduced, and insulin continues to bind to insulin receptors. Which of the following is most likely occurring?
Type 2 diabetes is characterized by an inability of the cell to correctly process the hormone insulin. Studies show that insulin continues to be produced by the pancreas, the amount of insulin... more
Why is ATP an important molecule in metabolism?
a. Its terminal phosphate group contains a strong covalent bond that does not contain much chemical energy b. Its hydrolysis provides an input of free energy for exergonic reactionsc. It provides... more
The major function of fermentation in our muscle cells is
A. to reduce NAD+ to NADHb. to generate lactic acid, which is later converted into fatty acid, which is a form of stored chemical energyc. not really known, and in fact it is believed fermentation... more
What process below would speed up a reaction by lowering the activation energy?
A. Adding heatB. Adding a catalystC. Increasing the amounts of reactantsD. Increasing the entropyE. All of the above would speed up a reaction by lowering the activation energy
A codon is a group of three bases that specifies a particular amino acid. Which of the following enzymes can ‘read’ codons on an mRNA?
a.DNA polymeraseb.Ribosomec.Primased.RNA polymerase
Where, on the mRNA coding for such a protein, would the ER signal sequence likely be located?
A. The signal sequence is not part of the mRNA and is added separately by an enzyme.B.Immediately before the stop codon.C. Anywhere in the mRNA.D.Immediately after the start codon.
How can dissolved materials be moved from the outside to the inside of a cell when the inside concentration of the material is higher than the outside concentration?
a. Molecules can be moved into a cell against their concentration gradient if that transport is coupled with osmotic transport of water into the cell.b. Substances can be moved against a... more
Products of a nonspontaneous reactions have a higher potential energy than the reactants. Which of the following statements are true? Select all that apply.
Select all that applya. ATP hydrolysis is an endergonic reaction that provides energy to drive exergonic reactionsb. Energy for nonspontaneous reactions comes from energetic coupling between... more
why does ATP have high potential energy?
a. Four negative charges clustered together in the three phosphate groups raise the potential energy of the bonds.b. The repulsion between ribose and the phosphate groups raises the potential... more
Nucleotide structure question
https://quizlet.com/_69plfz (image is at the top)What is true of the picture above it is an RNA molecule it is a DNA molecule #1 is a purine #2 is a pyrimidine . the molecules 5' end is the... more
In what way(s) is artificial selection different from natural selection?
a. with artificial selection there does not need to be heritable variation but with natural selection there does need to be heritable variationb. with artificial selection humans are the selective... more
Saline hypertonic/hypotonic/isotonic question
A nurse attaches an IV to a patient that provides a saline solution that is 5% sodium chloride and 5% potassium phosphate and contains no other solutes. If the total solute concentration of a red... more
Which of the following atoms can participate in hydrogen bonds?
a. carbonb. oxygenc. nitrogend. b and ce. all of the above
Phospholipid Bilayer Question
Question: At the start of an experiment, a phospholipid-bilayer membrane that contains the glucose transporter (GLUT-1) but no other proteins separates a 1-liter solution of 1M NaCl (on the right)... more
If the pH of a solution is 10 and the concentration of protons is increased 10 fold by the addition of acid what is the new concentration of protons?
a. 10^-10 Mb. 10^-11 Mc. 10^-9 Md. 1 Me. none of the above
If you disrupt all hydrogen bonds in a protein what level of structure will be preserved?
a. tertiaryb. secondaryc. primaryd. quaternarye. all of the above
What bonds must be destroyed for an RNA chain to be broken down into its monomeric nucleotides?
A. Phosphodiester bondsB. Covalent bondsC. Hydrogen bondsD. A and Be. A, B, and C
Cancer cells given vinblastine would be unable to _____.
undergo cytokinesis. extend lamellipodia to facilitate crawling. maintain a spherical nucleus. separate chromosomes during cell division. form microvilli.
The stability of DNA is affected by the number of hydrogen bonds,
The stability of DNA is affected by the number of hydrogen bonds, with more bonds promoting more stability. The double-stranded DNA molecule you would expect to have the greatest stability would be... more
According to the Watson and Crick model for the structure of DNA
According to the Watson and Crick model for the structure of DNA, _____ are on the outside and _____ are on the inside of the double-stranded DNA molecule, and the two strands of DNA run ____ to... more
If one strand of DNA has a C attached to a sugar with a free 5’ phosphate group, the other strand will have a _____ attached to a sugar with a free _____ group.
C; 5’ phosphate.C; 3’ hydroxyl.G; 3’ hydroxyl.G; 3’ phosphate.G; 5’ phosphate.
In a fragment of DNA, the content of guanine is 30%. What is percentage of thymine in this DNA fragment?
70%20%30%40%There is not enough information provided to answer this question.
Which of the following statements about base pairing is correct?
A pairs with T using 3 hydrogen bondsT pairs with C using 2 hydrogen bondsC pairs with G using 2 hydrogen bondsA pairs with G using 3 hydrogen bondsG pairs with C using 3 hydrogen bonds