QOTD

Question 1

fat digestion (to formation of fatty acids and glycerol)

Answer 1

• -some fats begin to digest in the mouth w lingual lipase
• -main fat digestion begins in the DUODENUM of the SMALL INTESTINE, fat digested with:
• -(1) Bile from the liver released to emulsify fat: change the environment so that fat and water can mix more easily, through amphipathic molecules
• -(2) pancreatic lipase released to chemically digest emulsified fats to form fatty acids and mono/diglycerides, NO FREE GLYCEROL MOLECULES

Question 2

would changing mass on top of an incline prevent block from sliding down; aka does mass affect friction force vs gravitational force

Answer 2

would changing mass on top of an incline prevent block from sliding down; aka does mass affect friction force vs gravitational force

Question 3

alpha decay

Answer 3

atom sheds two protons and two neutrons (alpha 4,2) = so mass is 4 and charge is 2
==> result is -4 mass and -2 charge

Question 4

beta minus decay

Answer 4

too few protons, so a NEUTRON will become a PROTON, electron (aka beta particle), and antineutrino
==> result is +1 charge, same mass

Question 5

beta plus decay (or positron emission)

Answer 5

too few neutrons, so a PROTON will become a NEUTRON, positron, and neutrino
==> result is -1 charge, same mass

Question 6

electron capture

Answer 6

too few neutrons, so a PROTON will ABSORB A ELECTRON and become a NEUTRON, produces a neutrino
==> same result as positron emission, result is -1 charge, same mass

Question 7

rate law equation

Answer 7

R = k[A]^a*[B]^b

Question 8

Differences between eukaryotic and prokaryotic cells

Answer 8

Prokaryotes: one “chromosome”, actually a plasmid; no organelles or microtubules or nucleus; DNA is organized around HU proteins (not histones); smaller ribosomes; vesicles and vacuoles present.

Eukaryotes: more than one chromosome or

Question 9

Kinsey scale

Answer 9

scale of how gay you are 0 being straight and 6 being homosexual

Question 10

Wernicke’s Area

Answer 10

is located in the cerebral cortex and is involved in understanding written and spoken language. Patients with Wernicke’s Aphasia (who have damage to this area) are unable to comprehend language.

Question 11

Broca’s area

Answer 11

is a region in the frontal lobe involved in language production (but not comprehension). Patients with Broca’s Aphasia (who have damage to this region) are able to comprehend speech, but have difficulty producing the muscle movements necessary for speech production

Question 12

Chylomicrons

Answer 12

• contain apolipoproteins and primarily transport triacylglycerol
• transport dietary triacylglycerol and originate in the small intestine

Question 13

VLDLs

Answer 13

• contain apolipoproteins and primarily transport triacylglycerol
• transport newly synthesized triacylglycerol and originate in the liver

Question 14

Positive vs Negative Reinforcement

Answer 14

Positive reinforcement adds a pleasant stimulus to increase a targeted behavior; negative reinforcement removes an unpleasant stimulus to increase a targeted behavior.

Question 15

What type of genetic material is necessary for a viral genome?

Answer 15

Either a DNA or RNA genome and either single or double stranded

Question 16

What stage of protein synthesis does NOT require energy?

Answer 16

Stages are Initiation –> Elongation –> Termination, and all three stages require energy

Question 17

Which neurotransmitter(s) is associated with both schizophrenia and Parkinson’s disease?

Answer 17

Schizophrenia is associated with high levels of dopamine, or high sensitivity to dopamine. Parkinson’s disease is associated with destruction of the dopaminergic neurons in the basal ganglia.

Question 18

Water does not easily penetrate the skin because:

Answer 18

A. dead keratinocytes and oil create a barrier to water penetration. The skin is constantly shedding dead keratinocytes (skin cells) from its surface while deeper living keratinocytes divide to replenish them. This layer of dead cells also has interspersed natural oils which combine with the dead cells to create a barrier to water. Keratinocytes also secrete keratin, a structural protein, to assist in the formation of this impenetrable barrier.

Question 19

A car accelerates from 0 m/s to 100 m/s in 5 seconds. What distance does the car drive over to achieve this acceleration?

Answer 19

from kinematics the equation d = (v_i + v_f)/2 * t. We get that this is 50 * 5 = 250m.

Question 20

Primary groups differ from secondary groups in that:

Answer 20

Primary groups have direct and close bonds between members, providing warm, personal, and intimate relationships to its members. Secondary groups, in contrast, form superficial bonds and tend to last for a shorter period of time.