#Question id: 4423
#Unit 3. Fundamental Processes
Each repeat unit within the nuclear ribosomal gene cluster of eukaryotes (rDNA) contains
#Question id: 2696
#Unit 2. Cellular Organization
Inverted repeat have a number of biological functions. Which of the following is a biological function of an inverted repeat?
#Question id: 5539
#Unit 5. Developmental Biology
When does neurulation occur during human pregnancy?
#Question id: 2876
#Unit 2. Cellular Organization
From the following set of statements regarding DNA topology, state whether each of the given statement is either True or False.
A. The two strands of cccDNA can be easily separated without any breakage of bonds.
B. Circular DNA molecules purified from bacteria and eukaryotes are usually negatively supercoiled.
C. Interwound writhe and spiral writhe are topologically different.
D. The organisms that live under extreme temperature conditions have been found to have positively supercoiled DNA.
E. Negative supercoils can be thought of as a store of free energy that aids in processes that require strand separation.
#Question id: 11293
#Unit 10. Ecological Principles
Measurement of phytoplankton production, take sample of phytoplankton suspended in two bottles in lake. One bottle (D) is dark in colour but second bottle (L) light in colour. After some time productivity measure as follow Where Lo –oxygen concentration in light bottle, Do –oxygen concentration in Dark bottle, Io –oxygen concentration in bottle before incubation
A) Lo- Do B) Lo- Io C) Io- Do