#Question id: 10997
#Unit 7. System Physiology – Animal
A 60-year-old woman has a resting heart rate of 70 beats/min, arterial pressure is 130/85 mm Hg, and body temperature is normal. Her pressure-volume diagram of the left ventricle is shown above.
What is her cardiac output in milliliters per minute?
#Question id: 10475
#Unit 1. Molecules and their Interaction Relevant to Biology
#Question id: 1290
#Unit 4. Cell Communication and Cell Signaling
Hydroxyproline is important in the formation of staple collagen polymers within cells. The formation of hydroxyproline requires:
#Question id: 4103
#Unit 3. Fundamental Processes
In a biochemical experiment, you compare the products from splicing reactions carried out in vitro using three different substrates. In each case the substrate is a construct containing a single intron surrounded by two exons, and in all cases the construct is the same overall size. But in one case, the intron is a group I intron, in another a group II intron, and in the third an intron removed by the spliceosome. Each construct is labelled in a manner that allows it to be detected after gel electrophoresis, and each is tested in two reactions—one, conditions that support self-splicing, and two, in the presence of nuclear extract as well. Note that, for simplification, only the final products of the splicing reaction are seen, but before degradation of the introns.
Which of the following observation is/are correct?
A. In lane A, the presence of nuclear abstract, a band for the lariat and the spliced product and pre-mRNA.
B. Lane B shows Group I Introns and Lane C is for Group II introns and reaction is nonself-splicing
C. Lane C is Group I intron. Splicing takes place in the absence and presence of nuclear abstract, and the reaction is self-splicing.
#Question id: 5218
#Unit 11. Evolution and Behavior
Several of the different globin genes are expressed in humans, but at different times in development. What mechanism could allow for this?