#Question id: 11844
#Unit 6. System Physiology – Plant
The following statements are made to describe the
biosynthetic pathway of IAA;
a) IPA pathway
involves a deamination reaction to form IPA, followed by a decarboxylation
reaction to form indole-3-acetaldehyde (IAld) and then oxidized to IAA by a
specific dehydrogenase
b) IAN pathway is similar to the IPA pathway, except that
the order of the deamination and decarboxylation reactions is reversed, and
different enzymes are involved
c) IAM pathway involves the two enzymes tryptophan monooxygenase and IAM hydrolase
d) In the IAN pathway, tryptophan is first converted to
indole-3-acetaldoxime and then to indole-3-acetonitrile. The enzyme that
converts IAN to IAA is called nitrilase
Which of the following is the correct statements of about the biosynthesis of IAA?
#Question id: 11068
#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, total lung capacity of 8 L, and respiratory rate of 15 breaths/min. What is the residual volume?
#Question id: 8685
#Unit 9. Diversity of Life Forms
Which of the following would be most useful in creating a phylogenetic tree of a taxon?
#Question id: 13204
#Unit 6. System Physiology – Plant
#Question id: 7265
#Unit 5. Developmental Biology
Following statement regarding to the cascade of regulated RNA splicing controls drosophila sexual differentiation.
A. The Sex-lethal (Sxl)
protein, encoded by the sex-lethal gene, is the first protein to act in the
cascade and present only in female embryos.
B. Early in development, the Sxl gene is transcribed from a
promoter that functions only in male embryos.
C. Later in development, this male-specific promoter is shut
off, and another promoter for sex-lethal becomes active in both male and female
embryos.
D. In male embryos, however, in the absence of early Sxl
protein, exon 3 of the sex-lethal pre-mRNA is spliced to exon 2 to produce an
mRNA that contains a stop codon early in the sequence.
Which of the following is correct?