Chapter 12 Interactive Activity

DNA and RNA

Click the button to begin the quiz.

1. What did scientists discover about the relationship between genes and

DNA? A.DNA stores and transmits the genetic infor

mation from one generation to the next.

B.Concluded that the genetic material was DNA, not protein.

C.Decided genes were made of protein.

D.A & B only.

E.All answers are correct.

2. What is the overall structure of the DNA molecule?

A.DNA is made of nucleotides, with a sugar-phosphate component.

B.DNA has the bases adenine, thymine, cytosine and guanine.

C.DNA has purines and pyrimidines.

D.DNA is a double helix, in which two strands were wound around each other.

3. What happens during DNA replication?

A.RNA copies the DNA.

B.TRNA brings amino acids to the ribosome.

C.DNA molecule separates into two strands, then produces two new complementary strands following the rules of base pairing.

D.Each strand of the double helix of DNA serves as a template, or model, for the new strand.

4. What are the three main types of RNA?

A. Adenine, uracil, cytosineB. tRNA, mRNA, rRNAC. Adenine, thymine, guanineD. ATRNA, MPRNA, DLRNA

5. What is transcription?

A. The mRNA takes the DNA code to the ribosome.

B.The mRNA copies the DNA code.

C.The tRNA bring amino acids to the ribosome.

D.The ribosome puts the amino acids in a certain order to make a protein.

6. What is translation?

A. Using the information from the mRNA to produce proteins.

B. Using the code from the tRNA to get amino acids.

C. Using the code of one side of the DNA to make a copy of DNA.

D. Using the ribosome to put the tRNA onto the mRNA.

7. What are mutations?

A. Mutations are monsters.B. Mutations are always harmful.C. Mutations keep a species healthy.D. Mutations are changes in the

genetic material.

8. How is meiosis different from mitosis?

A. Meiosis ends with 2 cells.B. Meiosis makes diploid cells.C. Meiosis has a single division.D. Meiosis ends with 4 haploid gamete

s.

9. What structures actually assort independently?

A. ChromosomesB. AllelesC. GenesD. Nucleotides