Untitled Flashcards

The cell theory, once proven and accepted, putto rest which popular theory that prevailed during the eighteenth and half ofthe nineteenth century?

Why do chemical reactions tend to speed up whenthe concentration of the reactants is increased?

An atom has six electrons in its valence shell.How many single covalent bonds would you expect it to form in mostcircumstances? 

The "heat" in chili peppers is due toa molecule called capsaicin. Suppose you breed only the hottest chili peppersover many generations, predict the characteristics of the resulting chilipeppers, and it's effect on the curved billed thrasher

On the tree of life, the branch leading toanimals is closer to fungi than it is to the branch leading to land plants.Which of the following statements is correct? 

When the atoms involved in a covalent bond havedifferent electronegativities, what type of bond results?

Which of the following molecules is polar?

The theory of ________________ was the belief that sickness wascaused from the inhalation of “ bad air”.

You'vebeen asked to analyze a reaction that took place at 300 K. ∆H was -150 and ∆S was+0.4. Is the reaction endothermic or exothermic? 

Why do chemical reactions tend to speed up when theconcentration of the reactants is increased? 

Which reaction is most spontaneous? 

Consider the following reaction at equilibrium: CO2 + H20 <---->H2CO3/ What would be the effect of adding additional CO2 and H2O?

Which of the following involves an increase in entropy?

Consider the buffering example discussed in class. Acetic acid (CH3COOH) and acetate (CH3COO-) form a buffer system. Which of the buffer components would INCREASE in concentration if we were to add a STRONG ACID to the solution containing the buffer?

In what important way does a competitive inhibitor differ from an allosteric inhibitor?

Consider the buffering example discussed in class. Acetic acid (CH3COOH) and acetate (CH3COO-) form a buffer system. Which one of the buffer components would increase in concentration if we were to add a strong base to the solution containing the buffer>

You disrupt all hydrogen bonds in a protein. What level of structure will be preserved?

Why do chemical reactions tend to speed up when heat is applied to the reaction mixture?

The lock-and-key analogy for enzymes applies to the

You have isolated a previously unstudied protein, identified its complete structure in detail, and determined that it catalyzes the breakdown of large substrate. You notice it has two binding sites. One of these is large, apparently the bonding site for the large substrate; the other is small, possibly a binding site for a regular molecule. What do these findings tell you about the mechanism of this protein?

Sickle-cell anemia results when valine replaces glutamate at position 6 of the B-globin subunit of hemoglobin. The sickling seen in red blood cells with the defective hemoglobin subunit affects the

What aspects of amino acid structure vary among different amino acids?

Water has a high specific heat because of the

Why are polymerization reactions (such as the one used to link amino acids together to form proteins) considered endergonic?