CHEM 280 LECTURE FINAL MIDTERM EXAM 2024 UPDATED QUESTIONS WITH ANSWERS VERIFIED BY EXPERTS

CHEM 280 LECTURE FINAL
MIDTERM EXAM 2024 UPDATED
QUESTIONS WITH ANSWERS
VERIFIED BY EXPERTS
Are lipds soluble in water? - CORRECT ANSWER>>>>no

are lipids soluble in non polar solvents? - CORRECT ANSWER>>>>yes

what is a non polar solvent? - CORRECT ANSWER>>>>bonds between atoms with
similar electronegativities, such as carbon and hydrogen

Is oleic acid saturated or unsaturated? - CORRECT ANSWER>>>>unsaturated

Is protein a source of energy? - CORRECT ANSWER>>>>no

Are amino acids similiar physically - CORRECT ANSWER>>>>no

What factor causes main chemical property difference - CORRECT ANSWER>>>>R
Group

which protein structure provides amino acids sequence - CORRECT
ANSWER>>>>primary structure

which protein has large scale , bend, folds in protein - CORRECT ANSWER>>>>tertiary
structure

do nucleic acids make lipids? - CORRECT ANSWER>>>>NO

which base is found in RNA but not DNA - CORRECT ANSWER>>>>Uracil

What do nucleotides consist of? - CORRECT ANSWER>>>>5 carbon sugar, phosphate
group, nitrogenous base

codons are genes of 3 bases, name one - CORRECT ANSWER>>>>RO Amino Acids

Define gene - CORRECT ANSWER>>>>segment of DNA that codes for a protein
proton

Alkyne - CORRECT ANSWER>>>>C2H2

,Propene - CORRECT ANSWER>>>>C3H6

`Propyne - CORRECT ANSWER>>>>C3H4

1-Pentane - CORRECT ANSWER>>>>CH3-CH2-CH2-CH=CH2

C2H4 will undergo what reaction - CORRECT ANSWER>>>>addition reaction

Aromatic compounds - CORRECT ANSWER>>>>bromo benzen

aldehyde= - CORRECT ANSWER>>>>propanol

ethanoic acid structure - CORRECT ANSWER>>>>O
||
CH3-C-OH

What was 4 purposes of the GENOME PROJECT - CORRECT ANSWER>>>>1. ID
people susceptible to certain diseases
2. develop new drugs
3. new drugs for genetic diseases
4. genetic basis for interlligence

portion of cell with genetic information - CORRECT ANSWER>>>>NUCLEUS

4 main cell components - CORRECT ANSWER>>>>1 proteins
2 nucleic acids
3 lipids
4 carbohydrates

glucose is a - CORRECT ANSWER>>>>monosaccharide

sucrose is a - CORRECT ANSWER>>>>disaccharide

cellulose and glycogen are - CORRECT ANSWER>>>>polysaccharides

If Iodine-131 has a half life of 8 days
How much of a 1000mg sample of I-131
would be left over after 32 days? - CORRECT ANSWER>>>>1000mg /32=31.25
*2=62.50

4 true things about a nuclear power - CORRECT ANSWER>>>>1. generates 20%
electricity
2. generates heat -> boils H2O ->steam->electrons
3. generates no air pollution /greenhouse
4. uses almost no fuel

, Alkanes - CORRECT ANSWER>>>>C4H10,
CH3CH2CH3
CH7H16
CH3CH2CH2CH2CH3

n-alkane - CORRECT ANSWER>>>>CH4
C2H6
C3H8
C4H10

Formula for heptane - CORRECT ANSWER>>>>C7H16

Formula for butane - CORRECT ANSWER>>>>C4H10

n-pentane - CORRECT ANSWER>>>>C5H12

Define isomers - CORRECT ANSWER>>>>same molecular formula but different
structures

how many isomers exist in alkane C4H10 - CORRECT ANSWER>>>>2

The prefix "but-" means that the base chain contains how many carbon atoms? -
CORRECT ANSWER>>>>4

C3H6 is an akalyne or alkane - CORRECT ANSWER>>>>alkane

which emission has a negative - charge - CORRECT ANSWER>>>>Beta

alpha emission - CORRECT ANSWER>>>>4/2 He

Beta emission - CORRECT ANSWER>>>>0/-1 e

positron emission - CORRECT ANSWER>>>>0/1+ e

what happends to the atomic number of a nucleus that emits a beta - CORRECT
ANSWER>>>>increases by 1

what is the missing particel? : 231 Th 227 Ra
90 --> 88 - CORRECT ANSWER>>>>Alpha emission 4/2 He

what is missing: 231 Th 231 Ae
90 --> 89 - CORRECT ANSWER>>>>positron 0/+1 e

what happens if emission positron takes over the atom - CORRECT
ANSWER>>>>decreases by one