Practice Questions

  1. Home
  2. Free Resources
  3. Practice Questions
  4. 4156
TLS Online TPP Program

#Question id: 4369

Which of the following is an incorrect association between transcription factors and their characteristics?

#Unit 3. Fundamental Processes

  1. TFIIB : interacts with RNA polymerase II.

  2. SPI: binds to GC-rich sequence.

  3. TFIIH: couples transcription to DNA repair.

  4. TFIIE : recognizes the core sequence CCAAT.

More Questions
TLS Online TPP Program

#Question id: 5772

#Unit 8. Inheritance Biology

A missense mutation in Neurospora will revert by treatment with nitrous acid (causes transversions), but not by hydroxylamine (causes AT -> GC transitions). The original mutation (not the reversion) must have been
TLS Online TPP Program

#Question id: 23104

#Unit 2. Cellular Organization

Which of the following statement is true regarding second level of organization 
a. The second level of organization is the coiling of the 10-nm fiber of nucleosomes into a helical array.
b. The coiled helical array to constitute the fiber of diameter 30 nm that is found in interphase chromatin and in mitotic chromosomes.
c. This compacts the DNA - 40-fold. The structure of this fiber requires the histone tails and is stabilized by linker histones.
d. Histone H1, histone tails, and increased ionic strength all promote the formation of the 30-nm fiber.
TLS Online TPP Program

#Question id: 11221

#Unit 7. System Physiology – Animal

The heart rate of a vertebrate will decrease in response to the arrival of ________.
TLS Online TPP Program

#Question id: 29098

#Unit 8. Inheritance Biology

A family in which club foot was inherited as an autosomal dominant trait. They discovered a mutation in the PITXI gene that caused club foot in this family. Through DNA testing, they determined that 11 people in the family carried the PITXI mutation, but only 8 of these people had club foot. Which of the following is the correct interpretation of the observation?
TLS Online TPP Program

#Question id: 29036

#Unit 11. Evolution and Behavior

Darwin’s hypothesis is that Exaggerated secondary sexual traits are favoured by sexual selection because they increase male mating success but more than higher exaggeration secondary sexual traits that leads to___