How To Analyse Chemical Composition?

Question 1

to perform chemical analysis, we take any living tissue and grind it in _____ acid using a mortar and a pestle

Answer 1

trichloroacetic

Question 2

all the carbon compounds that we get from living tissues can be called

Answer 2

biomolecules

Question 3

amino acids which have one amino group and one acidic group on the alpha carbon are called

Answer 3

alpha amino acids

Question 4

alpha amino acids are substituted _________ (an alkane)

Answer 4

methane

Question 5

the designated R group can be which groups

Answer 5

hydrogen
carboxyl group
amino group
variable group

Question 6

how many amino acids occur in proteins

Answer 6

20

Question 7

name of amino acid if R group is hydrogen

Answer 7

glycine

Question 8

name of amino acid if R group is methyl group

Answer 8

alanine

Question 9

name of amino acid if R group is hydroxy methyl group

Answer 9

serine

Question 10

example of acidic amino acid

Answer 10

glutamic acid

Question 11

example of basic amino acid

Answer 11

lysine

Question 12

example of neutral amino acid

Answer 12

valine

Question 13

examples of aromatic amino acids

Answer 13

tryosine
phenylalanine
tryptophan

Question 14

a particular property of amino acids is the ionizable nature of which groups

Answer 14

-NH2 and -COOH

Question 15

what happens to amino acids in solutions of different pHs?

Answer 15

their structure changes

Question 16

are lipids generally soluble in water

Answer 16

no

Question 17

a fatty acid has a ______ group attached to an R group

Answer 17

carboxyl

Question 18

maximum number of carbons that a fatty acid could have

Answer 18

20 including carboxyl carbon

Question 19

number of carbon atoms in palmitic acid

Answer 19

16 including carboxyl carbon

Question 20

number of carbon atoms in arachidonic acid

Answer 20

20 carbon atoms

Question 21

types of fatty acids

Answer 21

saturated
unsaturated

Question 22

glycerol is a lipid which is ________ (iupac)

Answer 22

trihydroxy propane

Question 23

two main components of simple lipids

Answer 23

fatty acids
glycerol

Question 24

in many lipids, fatty acids and glycerol are present together. here the fatty acid is ______ with glycerol

Answer 24

esterified

Question 25

lipids havin fatty acids and glycerol are called

Answer 25

glycerides

Question 26

how many types of glycerides are there

Answer 26

monoglycerides
diglycerides
triglycerides

Question 27

glycerides are also called ____ and _____ based on melting point

Answer 27

fats and oils

Question 28

why do oils remain as liquids in winters

Answer 28

because they have a low melting point

Question 29

what are phospholipids

Answer 29

lipids that have phosphorous and a phosphorylated organic compound in them

Question 30

phospholipids are found in

Answer 30

cell membrane

Question 31

example of phospholipid

Answer 31

lecithin

Question 32

examples of carbon compounds with heterocyclic rings

Answer 32

nitrogenous bases - adenine, thymine, uracil, guanine, cytosine

Question 33

when nitrogenous bases are found attached to a sugar, they are called

Answer 33

nucleosides

Question 34

if a nitrogenous base is attached to a sugar and a phosphate group is also attached, they are called

Answer 34

nucleotides

Question 35

nucleotides of the five nitrogenous bases

Answer 35

adenylic acid
thymidilic acid
guanylic acid
uridylic acid
cytidylic acid

Question 36

nucleosides of the five nitrogenous bases

Answer 36

adenosine
guanosine
thymidine
uridine
cytidine