Biological Process Quiz

Which enzyme is involved in DNA unwind + unzip?

• kinase
• helicase
• ligase
• polymerase

What building blocks are used to synthesize the 2 new strands?

• amino acids
• sugar molecules
• fatty acids
• nucleotides

What is the purpose of the 2 old strands?

• To provide energy for the cell
• To regulate gene expression
• To protect the cell from damage
• To serve as templates for DNA replication

What enzyme is involved in matching bases?

• Lipase
• DNA polymerase
• Amylase
• Pepsin

When is DNA replication happening? Prior to cell __________, it is important for the cell to make a copy of its own DNA. DNA replication ends up with twice the number of DNA molecules. During mitosis, each copy will be sent to each new cell.

• metabolism
• respiration
• division
• photosynthesis

With the help of different enzymes, DNA first __________ and then __________. At that point in the DNA molecule, the 2 strands are separated forming what is known as a fork of replication. Being separated, each original strand can serve as a __________ (model) for the synthesis of the new strand.

• unravels, combines, copy
• unwinds, separates, template
• twists, merges, model
• winds, connects, template

Free floating nucleotides come and only match with the nucleotides of the template sequence according to the pairing rule: A always pairs with __________, C always pairs with __________. These base pairs are held together by __________ bond (Weak).

• A, T, covalent
• G, C, ionic
• C, A, peptide
• T, G, hydrogen

Another enzyme, DNA polymerase, helps in the synthesis of the new strand by catalyzing a __________ bond between the sugar of one nucleotide and the phosphate group of the next nucleotide.

• hydrogen
• ionic
• covalent
• phosphodiester

The process ends with __________ molecules of DNA identical (__________) to each other and to the original DNA molecule. Each new molecule of DNA is made of one __________ strand and a newly synthesized strand. The 2 strands of each DNA molecule have __________ sequence of nucleotides.

• two, identical, original, the same
• one, unique, original, a unique
• four, similar, old, a similar
• three, different, new, a different

They got the Nobel prize for that work: Name the 2 scientists who published the structure of DNA. What year was it published?

• Albert Einstein and Marie Curie, 1948
• Isaac Newton and Galileo Galilei, 1666
• Charles Darwin and Gregor Mendel, 1859
• James Watson and Francis Crick, 1953