Chemistry

Question 1

Is NaBH4 or LiAlH4 a stronger reducing agent?

Answer 1

LiAlH4

Question 2

What is the structure of guanine?

Answer 2

Question 3

What is the structure of adenine?

Answer 3

Question 4

What is the structure of cytosine?

Answer 4

Question 5

What is the structure of thymine?

Answer 5

Question 6

Answer 6

Arginine

Question 7

Answer 7

Histidine

Question 8

Answer 8

Lysine

Question 9

Answer 9

aspartic acid

Question 10

Answer 10

aspartic acid (asp)

Question 11

Answer 11

Glutamic acid (GLU)

Question 12

Answer 12

Serine

Question 13

Answer 13

Threonine

Question 14

Answer 14

Asparagine (asn)

Question 15

Answer 15

Glutamine (Gin)

Question 16

What type of geometry corresponds with dsp3 hybridization?

Answer 16

trigonal bipyramidal

Question 17

What type of geometry corresponds with d2sp3 hybridization?

Answer 17

octahedral

Question 18

What type of geometry corresponds with dsp2 hybridization?

Answer 18

square planar

Question 19

What type of geometry corresponds with sp3 hybridization?

Answer 19

tetrahedral

Question 20

How many equivalents of a strong base (NaOH) are needed to neutralize a an acid?

Answer 20

One equivalent per acidic proton (2 for H2SO4)

Question 21

If pH > pKa, will the the equilibrium shift towards protonated species or deprotonated species?

Answer 21

Deprotonated because if there is a lot of acid(protonated species) then the equilibrium will shift towards the deprotonated species

Question 22

What is the henderson-hasselbalch equation?

Answer 22

pH = pKa + log (conj. Base/ conj. acid)

Question 23

What is the dissociation equilibrium constant Keq equal to when given Ka?

Answer 23

1/Ka

Question 24

What are the Purines?

Answer 24

Adenine and Guanine

Question 25

What are the pyrimidines?

Answer 25

Thymine and Cytosine

Question 26

Which sequence properly indicates the order of transmission for the impulses that result from transcranial magnetic stimulation?

Answer 26

Cerebral cortex, spinal cord, efferent neurons, skeletal muscle cells

Question 27

what is a positive control?

Answer 27

a control group that is not exposed to the experimental treatment but that is exposed to some other treatment that is known to produce the expected effect.

Question 28

what is a negative control?

Answer 28

A negative control group is a control group that is not exposed to the experimental treatment or to any other treatment that is expected to have an effect.

Question 29

How are nM and uM related?

Answer 29

1 nM to 0.001 uM

Question 30

How are uM and mM related?

Answer 30

1 uM to 0.001 mM

Question 31

The half-life of a radioactive material is:

Answer 31

the time it takes for half of all the radioactive nuclei to decay into their daughter nuclei.

Question 32

Where does the P come from in ATP when it is transferred via a kinase?

Answer 32

the gamma phosphate

Question 33

Which nucleotide bases create stronger interactions in DNA?

Answer 33

C-G They have greater pi stacking

Question 34

How are phospholipids strucutred?

Answer 34

Three fatty acids ester-linked to a single glycerol

Question 35

How do oxidation and reduction occur in a cell?

Answer 35

oxidation at the anode and reduction at the cathode

Question 36

What is the Ksp equation?

Answer 36

Question 37

How many electrons can occupy an energy level with quantum number n?

Answer 37

2n^2

Question 38

How many electrons can occupy a subshell w quantum number l?

Answer 38

2l^2 + 2