The accompanying figure shows how levels of a microRNA called miR-320b change with age in the prefrontal cortex of the brains of humans, chimps, and macaques (African monkeys)
This may be important for understanding the genetic features that make us human, because microRNAs ________. A) are found only in primates
B) are translated into short polypeptides
C) influence gene expression by binding to messenger RNAs
D) are transcribed from "selfish DNA" sequences such as Alu elements
E) are known to increase neuronal connectivity and therefore intelligence
C
You might also like to view...
If not all of the variation seen in the human population can be attributed to natural selection, then what else could be most likely responsible for this variation?
A. neutral selection B. sexual selection C. founder effect D. bottleneck effect E. None of the answer options is correct.
Large gut populations of Bifidobacterium are associated with ____
a. peptic ulcers b. irritable bowel syndrome c. gastroesophageal reflux disease d. improved immune function e. increased vital capacity
Replication of DNA
a. takes place during interphase. b. results in two double helices from one. c. is semiconservative. d. is all of the above.
Which statement best describes type 1 diabetes?
A. Near-normal insulin levels are maintained. B. Beta cells are hyperactive. C. It is the more common form of diabetes. D. Insulin-producing cells are attacked by the immune system. E. It often occurs as a result of obesity.