#Question id: 353
#Unit 1. Molecules and their Interaction Relevant to Biology
Measurements show that the pH of a particular lake is 4.0. What is the hydrogen ion concentration of the lake?
#Question id: 18774
#Unit 13. Methods in Biology
#Question id: 3788
#Unit 3. Fundamental Processes
The spontaneous loss of amino groups from adenine in DNA results in hypoxanthine, an uncommon base, opposite thymine. What combination of proteins could repair such damage?
#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: 8718
#Unit 9. Diversity of Life Forms
Which of the following would, if it had acted upon a gene, prevent this gene from acting as a reliable molecular clock?