72 Answered Questions for the topic AP biology

01/20/19

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

01/20/19

Which of the following statements is true about the central dogma of molecular biology?

Proteins provide instructions to produce functional products called DNA The process of translation is reversible Genetic information stored in DNA is transcribed into double stranded RNA, which is... more

01/16/19

A series of six to nine consecutive histidine residues can bind to immobilized metals such as nickel (Ni).

The purification of a protein containing six histidines at its C-terminus using a nickel-based resin would be achieved by _____ chromatography. size exclusion. cation exchange. anion... more

01/16/19

If Hershey and Chase had found 35S in both the pellet and the supernatant of the phage-infected bacterial culture, what would have been the most plausible conclusion?

The experiment would have been inconclusiveProtein must be the genetic material.DNA must contain sulfur.The bacteria were not infected with phageThe genetic information molecule definitely contains... more

01/16/19

Each of the following could result in the misfolding of a protein except _____.

the addition of a chaperone protein. a change of solvent from water to benzene. an increase in temperature to 100°C. a rapid change to a solvent at pH 12. the addition of 6M HCl, a strong acid.

01/16/19

Ionic interactions could occur between which of the following amino acids as part of a protein’s tertiary structure?

Two cysteines.Tryptophan and valine.Glutamic acid and arginine.Histidine and lysine.Serine and threonine.

01/16/19

Aspartic acid and glutamatic acid can form hydrogen bonds with water because they _____.

have phosphate groups in their side chains.have nonpolar, hydrophobic side chains.have polar, uncharged sided chains.have electrically charged side chains.have sulfhydryl groups in their side chains.

01/09/19

Where would the hydrogen bond would form between water and acetone?

the carbon atom in acetone and one of the hydrogen atoms in water. one of the hydrogen atoms in acetone and the oxygen atom in water. the oxygen atom in acetone and one of the hydrogen atoms in... more

01/09/19

Which pair of molecules is most likely to be miscible (i.e., each soluble in the other)?

Amino acid and methanol. Water and methanol. Methanol and octane. Amino acid and octane. Octane and water.

12/13/18

True or false. A receptor may act as a signal. Explain and justify your answer.

True or false. A receptor may act as a signal. Explain and justify your answer.

12/13/18

Describe how protein kinases and protein linked receptors may interact in a signal transduction cascade?

Describe how protein kinases and protein linked receptors may interact in a signal transduction cascade?

10/22/18

catalyzed reaction

You are analyzing a reaction catalyzed by an enzyme which functions at a pH of 9.0 and a temperature of 37C. You conduct the reaction at a pH of 3.0 and observe that the enzyme does not function.... more

10/22/18

Enzymes and catalysts

Which statement about enzymes is false?A)At low substrate concentration, the presence of an enzyme greatly increases the rate of a reaction, but once the enzyme becomes saturated, the reaction rate... more

03/07/18

What negative consequence can occur when non-native species are introduced into an ecosystem? (2 points)

a. Native species are forced to compete more vigorously.b. The introduced species prey on native species.c. The introduced species mate with native species and add genetic variety.d. The introduced... more

07/20/17

white matter within the central nervous system funtioncs primarily in what?

I need help answering these study questions for my final exam next week.

04/30/17

What are the different processes through which eggs and sperm are produced and why each is more prone to a different kind of genetic error?

What are the different processes through which eggs and sperm are produced and why each is more prone to a different kind of genetic error?

04/05/17

explain how a retroviruses must carry reverse transcriptase within its capsid in order to replicate

explain how a retroviruses must carry reverse transcriptase within its capsid in order to replicate

02/06/17

How does an undifferentiated B receptor cell become an activated B receptor cell?

 How does an undifferentiated B receptor cell become an activated B receptor cell?

12/11/16

Biology Assitance Needed :)

Hi, I would greatly appreciate if you could full elaborate on the purpose of a single peptide? Thanks in advance!

12/11/16

Biology Assistance Elaboration

Would appreciate if you were to fully elaborate on what the purpose of a C chain is in genetics? 

12/09/16

Biology Help Please

What is the purpose of a signal peptide?What is the purpose of the C chain?

12/07/16

Biology Help please!

For 60 years after the discovery of insulin by Banting and Best, insulin was extracted from beta cells of cattle or pigs to treat high blood sugar. Although the bovine insulin has 3 amino acids... more

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