Molecular Biology Answers

List and describe the four factors that affect the rate of diffusion

What happens to proteins within the endoplasmic reticulum?

A.) They are synthesized.
B.) They are broken down.
C.) They are converted into lipids.
D.) They are modified by enzymes.

PLEASE HELP!! Thank you!

What is the structure of Glucose, Fructose, Sucrose and Galactose?

Which option about cell cycle checkpoint is correct?

a) the decision to cross the R point is irreversible
b) some decisions made at checkpoints are reversible
c) all decisions made at checkpoints are reversible
d) option a & b
e) option a & c

Smallest gene affected by mutation is-
A)Muton B)Cistron C)Recon D)Exon

In DNA segment of six coils,22 bp are linked by two hydrogen bonds.How many cytosine bases would be present-
A)22 B)38 C)44 D)76
Please explain.

If there are 120 adenine molecules in B-DNA double helical structure showing 20 coils,what is pyrimidine nucleotides forming three hydrogen bonds in it-
A)80 B)100 C)120 D)140

Please explain.

1)Adenine is 30%.What would be percentage of guanine?
A)10% B)20% C)30% D)40%

2)In a DNA molecule cytosine is 18%.Percentage of adenine would be-
A)32% B)64% C)36% D)18%

3)Total amount of A and T in DNA is 45%.Amount of Guanine will be-
A)22.5% B)27.5% C)45% C)55%

4)In a DNA molecule Adenine is 31% and Guanine is 40%.What would be percentage of cytosine?
A)19% B)40% C)36% D)50%

Please explain easily.

What would happen if in a gene encoding polypeptide of 50 aminoacids 25th codon (UAU) is
mutated to UAA ?Explain.

Describe how a monomer is the basic unit of all macromolecules.