Review questions, Nov 18

 

1. Susan has a family history of Huntington’s disease (HD).  She is 40 years old and thinks she is showing early symptoms.  Her doctor recommended her to take genetic testing.  This type of testing is called ________. 

A. carrier testing                    B. predictive testing              C. diagnostic testing

D. newborn screening          E. prenatal testing

 

2. Susan’s brother John is 30 years old.  Although her brother is not showing any symptoms, he decided to take genetic testing.  This type of testing is called _______. 

A. carrier testing                    B. predictive testing              C. diagnostic testing

D. new born screening         E. prenatal testing

 

3. Susan’s sister Kathy is 25 years old.  Kathy knows that she carries the HD allele but she is not showing any symptoms.  She is pregnant and would like to have genetic testing of her baby.  This type of testing is called ________.

A. carrier testing                    B. predictive testing              C. diagnostic testing

D. new born screening         E. prenatal testing

 

4.  Which of the following statements does NOT describe DNA?

1. provides genetic blueprint for the living organisms.
2. forms the double helix structure.
3. found in nucleus.
4. contains urasil.
5. found in mitochondria.

 

5. If the nucleotide sequence of a strand of DNA is 5’- ATTGCACG -3’ (5’- and -3’ indicate the 5’ and 3’ ends of the DNA sequence), what is the sequence of the opposing strand?  Write the sequence from the 5’ end to the 3’ end.

A. ATTGCACG         B. TAACGTGC         C. GCACGTTA         D. CGTGCAAT

 

6. DNA polymerase adds nucleotides to the _____ end of DNA.

A. 5’                B. 3’                C. 1’                D. N-terminal             E. C-terminal

 

7. During the process of DNA replication, the two parental strands of DNA molecules are unzipped from _________.  The two daughter strands of DNA molecules grow as nucleotides are added by _________.   DNA fragments are joined together by ________.

1. the 5’ end ....................... DNA polymerase ................ DNA ligase
2. the 5’ end ....................... DNA replicase ....................  DNA polymerase
3. the 5’ end ....................... DNA ligase ......................... restriction enzyme
4. the origin of replication .. DNA polymerase ................. DNA ligase
5. the origin of replication .. DNA replicase ..................... DNA polymerase
6. the origin of replication .. DNA ligase .......................... restriction enzyme