#Question id: 11070
#Unit 7. System Physiology – Animal
A patient has a dead space of 150 ml, functional residual capacity of 3 L, tidal volume of 650 ml, expiratory reserve volume of 1.5 L, a total lung capacity of 8 L, respiratory rate of 15 breaths/min. What is the alveolar ventilation?
#Question id: 3526
#Unit 8. Inheritance Biology
In garden peas, the allele for tall plants (D) is completely dominant to the allele for dwarf plants (d) and the allele for violet flower color (W) is completely dominant to the allele for white flower color (w). In a cross between a tall violet plant, with the genotype DDWw, and a dwarf white plant, what phenotypic ratio of the progeny would be expected from this cross?
#Question id: 361
#Unit 1. Molecules and their Interaction Relevant to Biology
Calculate the percentage of histidine that has its imidazole side chain protonated at pH 7.3. The pKa values for histidine are pK1 = 1.8, pK2 (imidazole) = 6.0, and pK3 = 9.2.
#Question id: 7236
#Unit 5. Developmental Biology
Which of the following statement justified that the PMZ in chick is
functionally equivalent to the amphibian Nieuwkoop center?
A.
The posterior marginal zone produces Wnt8c and that, the PMZ cells secrete Vg1,
a member of the TGF-β family.
B.
PMZ cells capable of inducing the accumulation of β-catenin
C.
PMZ cells secretes BMP, a member of the TGF-β family.
D.
PMZ secretes its own Nodal antagonist—the Lefty protein.
Which of the following combination is correct?
#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.