Hemoglobin is a protein that is found in red blood cells. It binds to oxygen and carries it to our body cells for cellular respiration. Hemoglobin is coded for by a segment of DNA called a ___________________.
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Question 2
2.
During the making of proteins, mRNA plays a large role. It has a job both in the nucleus working with DNA and in the cytoplasm working on the ribosome. Please explain mRNA's roles in both the nucleus and the ribosome.
Figure 1. mRNA on the ribosome for step 2 of protein synthesis.
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Question 3
3.
A segment of DNA is shown below. It codes for SWS opsin protein that absorbs wavelengths of light in the blue range. It sits in the membrane of blue or SWS cone cells and communicates the sight of blue and some other colors to the brain. Using the information below:
1. Transcribe the DNA segment that codes for the SWS opsin protein, to make an mRNA transcript.
DNA Template strand: TAG GTG GGC CCC ATG GAA
2. Use the mRNA transcript you create, and the selection of tRNA molecules below, to determine and list the order of amino acids in the SWS opsin protein.
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Question 4
4.
The MWS opsin protein and LWS opsin protein both have similar jobs, communicating the sense of color to the brain. The reason for their differening functions is because of their slightly different sequences of amino acids as shown below. Which of the following DNA sequences would most likely be proper sequences to code for the last three amino acids in each of these proteins? (HINT: Think abou the relationship of DNA to amino acid sequence when determining the correct answer)