Official Guide

Question 1

if you have a solid and you want to titrate

Answer 1

if you have a salt, you want to mix with HCl so that you get a weak acid, then addition of NaOH will give you the right moles of OH and H

Question 2

ATP hydrolysis in muscle contraction

Answer 2

Dissociation of the myosin head from the actin filament requires the binding of ATP (I). Attachment of the myosin head to the actin filament requires calcium and a troponin/tropomyosin shift (II). The conformational changes that move actin and myosin relative to one another require that ATP be hydrolyzed, (cocked back into high energy) for these changes occur upon release of the products of hydrolysis (ADP and Pi) by the myosin head (III). Binding of troponin to actin does not require the hydrolysis of ATP (IV). Release of calcium from the sarcoplasmic reticulum also does not require ATP hydrolysis. This release occurs when calcium ions move via voltage-gated ion channels down their concentration gradient (V). The reuptake of calcium into the sarcoplasmic reticulum occurs via an ATP-hydrolyzing pump that moves calcium against its concentration gradient (VI).

Question 3

e.coli membrane

Answer 3

E. coli membranes are roughly 75% protein and 25% phospholipid, by mass.

Question 4

what doesnt have nuclei

Answer 4

platelets and RBC and are derived from bone barrow

Question 5

cognitive dissonance

Answer 5

o when an individual’s attitudes are incongruent with his or her behavior, this leads to cognitive dissonance.
eliminate cognitive dissonance, the individual can either change his or her attitudes or his or her behavior. The theory posits that individuals are more likely to adjust their attitudes to align with their behavior than the other way around.

Question 6

gender script

Answer 6

a script is organized information regarding the order of actions that are appropriate to a familiar situation.

Question 7

gende schemas

Answer 7

The cognitions regarding what constitutes the male identity are an example of schemas.

Question 8

token economy

Answer 8

Rewarding individuals with secondary reinforcers that can be exchanged for appetitive stimuli is typical of a token economy, a type of operant conditioning