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TLS Online TPP Program
#Question id: 34179
#Unit 3. Fundamental Processes
A. At the replication fork, the dsDNA in front of the fork becomes increasingly positively supercoiled.
B. At the replication fork, the dsDNA in front of the fork becomes increasingly negatively supercoiled.
C. The “swivelase” that prevents the accumulation of positive supercoils ahead of the replication fork.
D. The “swivelase” that prevents the accumulation of negative supercoils ahead of the replication fork.
Which of the following combination of statements is correct
TLS Online TPP Program
#Question id: 26974
#Unit 10. Ecological Principles
Trade off is caused by
TLS Online TPP Program
#Question id: 18969
#Unit 8. Inheritance Biology
Consider the ABO “blood type” gene. This single gene has three alleles called A, B, and O. There are four resultant “blood types” (phenotypic classes), as follows:C
Assume Hardy-Weinberg equilibrium. In Norway, the frequencies of the A and B alleles are 0.26 and 0.07, respectively. What is the frequencies of these six genotypes (AA, AO, BB, BO, AB, and OO);
TLS Online TPP Program
#Question id: 1377
#Unit 4. Cell Communication and Cell Signaling
Which of the following statements apply to both eukaryotic cell walls and animal cell extracellular matrices? Please select all that apply.
a) They are inflexible structures that support cells.
b) They are built to a common overall structure that can be described as 'fibres in a matrix'.
c) Their protein components are synthesized by ribosomes of the rough endoplasmic reticulum.
d) They limit the diffusion of ions and small molecules into the cell.
TLS Online TPP Program
#Question id: 18981
#Unit 13. Methods in Biology
The pL promoter is controlled by the cl repressor protein of bacteriophage A. In practice, a temperature-sensitive mutant of the cl repressor, cl857, is generally used to regulate pL-directed transcription. Cells carrying the temperature-sensitive cl repressor are first grown at 30°C, and 42°C