Lecture 1 Biochemistry

Question 1

Biochemistry as the chemistry of livings things, including structure and function of biological molecules and mechanism and product of their reaction is a Biology/chemistry definition

Answer 1

chemistry

Question 2

Biochemistry as the organic chemistry of compounds and processes occurring in organisms is a biology/chemistry definition

Answer 2

bIology

Question 3

True/False Biochemistry is the practice of the molecular description of life, medical, agricultutal, commercial production

Answer 3

true

Question 4

Waht are the 3 main group of life

Answer 4

Bacteria, Archae, Eukarya

Question 5

Eukaryote / Prokaryote has a simple form of life, unicellular, short-life cycle

Answer 5

prokaryote

Question 6

Which has large cells Eukaryote/Prokaryote

Answer 6

eukaryotes (10 to 100 micrometers)

Question 7

Why is it important to have compartmentalization in eukaryote

Answer 7

because it regulates things better and makes it more efficient

Question 8

Which is specializes in a stable environment and has a long life cycle

Answer 8

Eukaryotes

Question 9

Are prokaryotes and eukaryote composed of the same molecule?True/False

Answer 9

true

Question 10

What is the monomer of proteins/enzyme

Answer 10

amino acids

Question 11

what is the macromolecule of simple sugar

Answer 11

complex carbohydrates

Question 12

What is the monomer of nucleic acids (RNA/DNA)

Answer 12

nucleotides

Question 13

what is the macromolecule of lipids

Answer 13

bio-membranes lipoproteins

Question 14

What is the monomer of enzyme

Answer 14

cofactors (vitamins.metal ions)

Question 15

What monomer is responsible for catalysis, structure and signalling

Answer 15

amino acids

Question 16

what monomer is responsible for fuel, structure and protein/lipid modification

Answer 16

simple sugar

Question 17

What is the functon of lipid

Answer 17

cellular compartmentation, lipid transport, fuel, signalling

Question 18

How many molecules are required for simple life

Answer 18

33 small molecules

Question 19

how many amino acids are in the protein required for simple life

Answer 19

20 L-amino acids

Question 20

How many DNA and RNA molecules are needed for simple life

Answer 20

5 aromatic bases, 2 5-carbon sugars

Question 21

what form of polysaccharides, cellulose, starch is needed for simple life

Answer 21

1 alpha D-glucose

Question 22

What are the lipids required for simple life?

Answer 22

2 fatty acids, 1 sugar alcohok, 1 notrogenous alcohol, 1 phosphoric acid

Question 23

What is the bond between amino acid residues

Answer 23

peptide bond

Question 24

Is the bond between nucleic acid strong or weak bond

Answer 24

strong bond

Question 25

Why is carbon stronger in stability with water than silicon

Answer 25

water has shorter C-C bond which means a stronger interaction.

Question 26

is Si stale in water

Answer 26

no, they do not have a stable bond so unable to sustaon life.

Question 27

Important characteristics of carbon for life

Answer 27

1. can form 4 high stable covalent bond 2. high functionality 3. can form C-C chains 4. its oxide is a soluble gas that is cheically available

Question 28

Describe hydrogen bonds

Answer 28

they are electrostatic interactions and neither ionic nor covalent bonds

Question 29

Can heat break hydrogen bond

Answer 29

YES

Question 30

The low solubility of hydrophobic groups in water are driven by

Answer 30

high entropy G=H-T-S

Question 31

What are other non-covalent bond that are important in biological structure and function

Answer 31

1. ionic interactions 2. hydrogen bonds 3. hydrophobic interactions 4. van der waals interaction

Question 32

Why is water essential in life (characteristics)

Answer 32

1. hydrogen bonding in water 2. hydrogen bond are important in biological process (water can dissolve polar uncha®gerd molecules 3. forms solvation shell around ions 4. reactant in biochemical process