mRNA Comparison A scientist studies the production of a key digestive enzyme in silk moths. The moths have one gene for this enzyme, and the scientist extracts mRNA transcribed from this gene as well as protein translated from it. The gene has three introns in its sequence. Use the passage to answer the question. Part A: If the researcher compares mRNA from inside the nucleus to mRNA from the ribosomes, what will be found? A. less mRNA in the nucleus B. shorter mRNA in the ribosomes C. identical mRNAs in both places D. mRNA covalently attached to protein in the nucleus Part B: Use the passage to answer the question. If the same scientist extracts the DNA for this gene and finds that it becomes methylated over the life of the organism, how will digestion change over time? A. It will occur at lower pH. B. It will rely more on this enzyme over time. C. It will use methylated copies of the enzyme. D. It will involve a lesser quantity of this enzyme over time.
Bacterial Genomics
The study of the morphological, physiological, and evolutionary aspects of the bacterial genome is referred to as bacterial genomics. This subdisciplinary field aids in understanding how genes are assembled into genomes. Further, bacterial or microbial genomics has helped researchers in understanding the pathogenicity of bacteria and other microbes.
Transformation Experiment in Bacteria
In the discovery of genetic material, the experiment conducted by Frederick Griffith on Streptococcus pneumonia proved to be a stepping stone.
Plasmids and Vectors
The DNA molecule that exists in a circular shape and is smaller in size which is capable of its replication is called Plasmids. In other words, it is called extra-chromosomal plasmid DNA. Vectors are the molecule which is capable of carrying genetic material which can be transferred into another cell and further carry out replication and expression. Plasmids can act as vectors.
mRNA Comparison
A scientist studies the production of a key digestive enzyme in silk moths. The moths have one gene for this enzyme, and the scientist extracts mRNA transcribed from this gene as well as protein translated from it. The gene has three introns in its sequence.
Use the passage to answer the question.
Part A:
If the researcher compares mRNA from inside the nucleus to mRNA from the ribosomes, what will be found?
Part B:
Use the passage to answer the question.
If the same scientist extracts the DNA for this gene and finds that it becomes methylated over the life of the organism, how will digestion change over time?
Silkworm (Bombyx mori) larvae that are used for silk production are mainly fed on mulberry leaves. They produce a special digestive enzyme besides amylase known as beta-fructofuranosidase that is not affected by the alkaloids present in the mulberry leaves.
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