Biology Answers

Answer the ff. questions:

1. What is the fate of proteases after their role in protein digestion?

2. Why is arginine classified as an essential amino acid in humans when it is synthesized in the urea cycle?

3. How do higher organisms obtain ammonia?

1.Name the type of bond that links

a.A nucleotide to another nucleotide in a DNA molecule

b. A nitrogenous base to a ribose sugar in an RNA molecule

2.Draw the structures of the amino acids tyrosine and aspartic acid

3.Briefly explain how enzymwe descrease the activation energy of biocchemical reactions

4.A nucleic acid has 13% of adenine. Determine the composition of guanine , cytosine and thymine

5.What are the forces that stabilizedouble stranded DNA?

6.Provide the structures and functions of three biochemically important disaccharides

7.What arethe structural and functional differences between starch and cellulose

What are the essential parts of culture Serum that are needed for long-term survival of a cellular culture? I know growth factors are a major part, are there any others??

1. What are the one letter and three lettter abbriviation for the following amino acids

a.glutamine

b.lyptophan

c.lysine

2.What are forces that stabilize the double stranded DNA?

3.Give the structural differences between RNA and DNA

1.Briefly discuss five importance of biochemistry in agricultural science

2.using the following schudles below indicate whether the the listed structural components are present or absent in prokaryotes or eukaryotes

golgi apparatus

plasma membrane

cytoskeleton

mitochondrion

nucleolus

chloroplast

cell wall

nuceus

ribosome

smooth endoplasmic reticulum

3.state the biomolecular composition and function of the following cell components:

plasma membrane , rough endoplasmic reticulum, cell wall,mitochondria,chloroplast.

4.state why oils form plant sources remain liquid at 25 % c, but that of animal source is solid at the same temperature

5.Name two major lipid constituents of cell membranes

6.give two biological significance of steriods

7.calculate the salt to ratio [A-]/[HA] of a solution of an amino acid at pH 2 and pka of 8.95

Can gametes be a parent cell or a parental generation?

the activation energy barrier is surmounted by?

what happens when an individual with 17 chromosomes mates with an individual

of the same species with 16 chromosomes.

state any 6 difference mechanisms how some species decrease the chances of their mating with another individually?

Structure of lipids