Infection of the skin by Trichophyton rubrum results in raised red scaly patches of skin, a condition known as
A. dermatophytosis.
B. candidiasis.
C. mucormycosis.
D. pityriasis.
E. sporothrichosis.
Answer: A
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Jacob and Monod were intellectually primed to draw the conclusions they did concerning regulation of the lac operon. In part, this was due to their fascination with mechanisms of enzyme regulation. They knew that the activity of some enzymes is regulated
when their reaction product binds to the enzyme, changing its shape and, therefore, its activity. This knowledge allowed them to easily make the intellectual leap to propose _____. A) the existence of the CAP binding site B) allosteric regulation of the repressor C) positive regulation of the lac operon D) the existence of the operator E) co-transcribed and co-regulated genes of bacterial operons
Answer the following statements true (T) or false (F)
1. DNA polymerase is a protein used in many biotechnology methods that cuts DNA sequences into fragments that can then be pasted into vectors. 2. The method of the polymerase chain reaction (PCR) is used to make enough exact copies of DNA for researchers to use in analysis. 3. Preimplantation genetic diagnosis uses DNA testing to examine the genes in sperm, egg, or embryo cells. 4. The desired outcome of human gene therapy is to find substitute genes from other organisms to cure a disease condition. 5. If farmers use glyphosate-resistant crops, they can spray their fields with a herbicides and it will not harm the plant.
How would a plant that normally grows in a shady habitat respond when exposed to a high level of far-red light?
a) Its stem would not elongate because it grows well in far-red light. b) Its stem would not elongate because it cannot grow in far-red light. c) Its stem would elongate to escape the far-red light. d) Its stem would elongate to absorb more far-red light.
The genus of pathogenic cocci responsible for a wide range of human disease and whose members grow in chains is (Staphylococcus/Streptococcus/Enterococcus)
What will be an ideal response?