1.1-1.3 HBIO

Which of the following are required in a polymerase chain reaction (PCR)?

• DNA polymerase, template strand and primers

• RNA polymerase, template strand and primers

• DNA polymerase, template strand and ligase

• RNA polymerase, ligase and primers

Which of the following diagrams shows the correct structure of DNA?

• 
• 
• 
• 

A section of double stranded DNA was found to have 60 guanine bases and 30 adenine bases.

What is the total number of deoxyribose sugars in this section?

• 30

• 90

• 180

• 270

The following terms describe different structures into which DNA can be organised within cells.

1 Linear chromosome

2 Circular chromosome

3 Circular plasmid

Which of these terms describe how DNA is organised within photosynthetic plant cells?

• 1 only

• 2 only

• 1 and 2 only

• 2 and 3 only

Which of the following molecules are required in the replication of the lagging strand of a DNA molecule?

• DNA polymerase and ligase only

• DNA polymerase and primers only

• Ligase and primers only

• DNA polymerase, ligase and primers

The diagram shows a molecule of tRNA.Which row in the table identifies Region X, Bond Y and Region Z?

• X-amino acid attachment site

  Y-hydrogen

  Z-anticodon

• X-anticodon

  Y-hydrogen

  Z-amino acid attachment site

• X-amino acid attachment site

  Y-peptide

  Z-anticodon

• X-anticodon

  Y-peptide

  Z-amino acid attachment site

Triplets of DNA nucleotides that code for the sequence of amino acids in this protein are

• CCA UUC UUC AUA UAA

• GGT TTC TTC ATA TAA

• CCA AAG AAG TAT ATT

• CCA AAG AAG UAU AUU

DNA from a mother, child and four men (A, B, C and D) in a paternity suit was analysed. The DNA was amplified using PCR and separated by gel electrophoresis.

From the results shown in the diagram, identify the likely father of the child.

• A

• B

• C

• D

The diagram shows the structure of part of a DNA molecule.Which row in the table identifies subunit X and prime end Y?

• X-nucleotide

  Y-3’

• X-amino acid

  Y-5’

• X-amino acid

  Y-3’

• X-nucleotide

  Y-5’

The list describes features of different chromosomes:

1. Circular shape.

2. Linear shape.

3. Associated with proteins.

Which of the descriptions apply to chromosomes in prokaryotes?

• 1 only

• 3 only

• 2 and 3 only

• 1, 2 and 3 only