Question: Each olfactory receptor (OR) gene is involved in detecting specific odors. However, humans are losing OR genes: while mice and other mammals have ~1500 such genes, humans have ~900 (the rest received deactivating mutations that turned them into pseudogenes). One such gene is associated with detecting the odor of an […]

Q1. Which of these statements is true regarding plasmids? 1. Plasmids, which are associated with membrane proteins, depend on bacterial chromosomal DNA for replication. 2. Plasmids are generally circular pieces of RNA. 3. Prokaryotic plasmids may carry genes that provide antibiotic resistance to the cell. 4. Prokaryotic plasmids are NOT […]

Q. 1.A graduate student is trying to recognize the gene coding for an enzyme found in a bacterial species that degrades trinitrotoluene (TNT). The student is frustrated to find that the organism does not produce the enzyme when grown in nutrient broth, making it difficult to collect the mRNA needed […]

Question 1: A certain type of sandwich has caused severe indigestion in those who eat it. The sandwich seemingly remains in the consumer’s stomach for over 7 hours before completely moving into the small intestine. Which of the following organs/systems/processes could the sandwich potentially be affecting? Select ALL that could […]