Question

.1.  Listed below are features of biological molecules. For each, indicate if the feature describes a characteristic of DNA, or RNA, neither DNA nor RNA, or both DNA and RNA. 

Single stranded 

Contains hydrogen bonds 

Is a long molecule 

Contains covalent bonds 

Is translated to protein 

Contains complex carbohydrate 

Contains thymine 

Double stranded 

Is a short molecule 

Contains uracil 

Has peptide bonds 

Contains nucleotides 

Contains guanine 

Is confined to the nucleus 

Makes a replication fork 

2. What is a protein? 

3. A peptide bond (check "Yes" if correct; "No" if incorrect): Yes Ne 

A. Joins nucleotides in a nucleic acid _______ 

B. Joins amino acids in a protein _______ 

C. Contributes to tertiary protein structure intra-chain bonding _______ 

D. Joins adjacent glucose molecules in cellulose _______ 

E. Can be found in all macro-molecules _______ 

 F. Is the result of dehydration synthesis _______ 

4. DNA Polymerase III transcribes a new chain of DNA starting from which end of the DNA template? 

5. In what part of the cell do the three types of RNA (mRNA, RNA, and rRNA) collaborate to produce a new protein?

Answer 1

1) Single stranded- RNA. DNA is mostly double stranded.

2) Contains hydrogen bonds- Both DNA and RNA. It stabilizes both the macromolecules.

3) Is a long molecule- DNA. RNA is mostly shorter than DNA.

4) Contains covalent bonds- Both DNA and RNA.

5) Is translated to protein- RNA. DNA is transcripted to mRNA, and then the mRNA is translated to protein.

6) Contains complex carbohydrate- Neither DNA nor RNA

7) Contains thymine- Only DNA. RNA contains uracil instead of thymine.

8) Double stranded- DNA. RNA is mostly single stranded. Only tRNA sometimes forms double stranded structures.

9) Is a short molecule- RNA. DNA is mostly longer than RNA.

10) Contains uracil- RNA.

11) Has peptide bonds- Both DNA and RNA. They contain phosphodiester bond which links two consecutive sugar molecules.

12) Contains nucleotides - Both DNA and RNA. It contains a nitrogenous base, a sugar molecule and a phosphate.

13) Contains guanine- Both DNA and RNA.

14) Is confined to the nucleus- DNA. RNA is mostly found in the cytoplasm of the cell.

15) Makes a replication fork- DNA.

Answer 2

1.

Single stranded - It's a characteristic of RNA.

Contains hydrogen bond - It's a characteristic of both DNA and RNA.

Is a long molecule - It's a characteristic of DNA.

Contains covalent bands - It's a characteristic of both DNA and RNA.

Is translated to protein - It's a characteristic of both DNA and RNA.

Contains complex carbohydrates - It's a characteristic of both DNA and RNA.

Contains thymine - It's a characteristic of DNA.

Double stranded - It's a characteristic of DNA.

Is a short molecule - It's a characteristic of RNA.

Contains uracil - It's a characteristic of RNA.

Has paptide bond - It's a characteristic of both DNA and RNA.

Contains nucleotides - It's a characteristic of both DNA and RNA.

Contains guanine - It's a characteristic of both DNA and RNA.

Is confined to the nucleus - It's a characteristic of both DNA and RNA.

Make replication fork - It's a characteristic of DNA.

2. Protein is a macromolecule which essential nutrients of body.

Protein is produced from DNA, DNA to mRNA and mRNA to protein.

Protein gives energy to the body.

3.

A . Joins nucleotides in a nucleic acid - No

B . Joins amino acid in protein - Yes

C . Contributes to tertiary protein structure intrachain bonding - No

D . Joins the adjacent glucose molecules in cellulose - No

E . Can be found in all macro molecules - Yes

F . Is the result of hydrogen synthesis - No

4 . DNA polymerase III transcribed a new chain of DNA from 3' end of DNA template.

5 . In side the ribosome the three types of RNA is collaborate to produce a new protein.

Protein is synthesized from DNA to mRNA and mRNA to protein.

mRNA carris the genetic information copied from DNA.

tRNA is the key to deciphering the code words in mRNA.

rRNA associates with a set of proteins to form ribosomes.