#Question id: 10332
#Unit 9. Diversity of Life Forms
The four-chambered hearts of birds and the four-chambered hearts of mammals evolved independently of each other. If one were unaware of this independence, then one might logically conclude that
#Question id: 4255
#Unit 3. Fundamental Processes
How might a single base substitution in the sequence of a gene affect the amino acid sequence of a protein encoded by the gene?
#Question id: 7309
#Unit 5. Developmental Biology
Following statements are regarding to the molecular basis of the coincidence model in Arabidopsis.
A.
In Arabidopsis under short days, there is little overlap between CO mRNA
expression and daylight.
B.
CO protein does not accumulate to sufficient levels in the phloem to promote
the expression of the transmissible floral stimulus and the plant remains vegetative.
C. Under long days, the peak of CO mRNA abundance (at hours 12 through 16) overlaps with daylight (sensed by phyA and cryptochrome [cry]), allowing CO protein to accumulate.
D. CO activates FLC mRNA expression in the phloem, which
causes flowering when the FT protein is translocated to the apical meristem.
Which of the following is incorrect?
#Question id: 1632
#Unit 4. Cell Communication and Cell Signaling
A single plasma cell secretes:
#Question id: 4064
#Unit 3. Fundamental Processes
Which of the following mutations can result in a reduction of β-galactosidase?