Topic 2/7 - Part 2 - Pictures/Diagrams Flashcards
Annotate a diagram of the 3D structure of the DNA molecule
Draw a nucleotide
Refer to picture
Draw a simple diagram of RNA (using circles/pentagons/rectanges)
Refer to picture
Draw a simple diagram of DNA (using circles/pentagons/rectanges)
Refer to picture
Classify the following molecular structure as purine or pyrimidine
Purine (guanine)
Classify the following molecular structure as purine or pyrimidine
Pyrimidine (cytosine)
Classify the following molecular structure as purine or pyrimidine
Pyrimidine (uracil)
Classify the following molecular structure as purine or pyrimidine
Purine (adenine)
Classify the following molecular structure as purine or pyrimidine
Pyrimidine (thymine)
With the help of a diagram, explain the process of DNA replication
- Helicase uncoils the DNA
- RNA primase adds short sequences of RNA to both strands (the primer)
- The primer allows DNA polymerase III to bind and start replication
- DNA polymerase III adds nucleotides to each template strand in a 5’→3’ direction
- These nucleotides are initially deoxyribonucleoside triphosphates but they lose two phosphate groups during the replication process to release energy
- One strand is replicated in a continuous manner in the same direction as the replication fork (leading strand)
- The other strand is replicated in fragments (Okazaki fragments) in the opposite direction (lagging strand)
- DNA polymerase I removes the RNA primers and replaces them with DNA
- DNA ligase then joins the Okazaki fragments together to form a continuous strand
Draw a diagram to illustrate PCR
Refer to picture
Draw a labelled diagram to illustrate the process of trancription
Refer to picture
Refering to the RNA codon table, deduce the amino acid sequence that corresponds to the following mRNA sequence:
AUGCGCGCGAGGUAA
Met Arg Ala Arg STOP
Refering to the RNA codon table, deduce the mRNA codons for tryosine (Tyr).
UAU / UAC
Refering to the RNA codon table, deduce the amino acid sequence that will be coded for given the following mRNA sequence: GUAUGCACGUGACUUUCCUCAUGAGCUGAU
Answer: (codons) GU AUG CAC GUG ACU UUC CUC AUG AGC UGA U Answer: (amino acid) Met His Val Thr Phe Leu Met Ser STOP