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TLS Online TPP Program

#Question id: 27504

Which kind of catalysis are used by the topoisomerases

#Unit 2. Cellular Organization
  1. acid-base catalysis
  2. Metallic catalysis

  3. Covalent catalysis

  4. Non-covalent catalysis
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TLS Online TPP Program

#Question id: 31102

#Unit 2. Cellular Organization

Which of the following statements are correct regarding the actin polymerization?

a) the concentration of G-actin is above the Cc, the filament end will grow
b) the concentration of G-actin is below the Cc, the filament end will grow
c) (+) end of microfilament polymerization is much faster than the (-) end
d) D form that adds to the filament and the T form that leaves
TLS Online TPP Program

#Question id: 27630

#Unit 1. Molecules and their Interaction Relevant to Biology

α helices are common components of polypeptide chains, they need to be of a certain minimum length of then which of the following graph is correctly representing that certain minimum length condition
TLS Online TPP Program

#Question id: 16310

#Unit 7. System Physiology – Animal

The temperature of the body is regulated almost entirely by nervous feedback mechanisms, and almost all these mechanisms operate through temperature regulating centers located in the hypothalamus. Following statements are as follows:
A. The anterior hypothalamic-preoptic area contains large numbers of heat-sensitive neurons, as well as about one third as many cold-sensitive neurons. These neurons are believed to function as temperature sensors for controlling body temperature.
B. The heat-sensitive neurons increase their firing rate 2- to 10-fold in response to a 10°C increase in body temperature. 
C. The cold-sensitive neurons, by contrast, increase their firing rate when the body temperature increases.
D. Anterior hypothalamus integrates the central and peripheral temperature sensory signals.
Which of the following combination is correct?
TLS Online TPP Program

#Question id: 1502

#Unit 4. Cell Communication and Cell Signaling

The textbook states that cells of patients with adenomatous polyposis coli (APC) “contain a deletion of a small portion of chromosome #5, which was subsequently identified as the site of a tumor-suppressor gene called APC.” In which cells of these patients would you expect to find this chromosomal deletion?
TLS Online TPP Program

#Question id: 3562

#Unit 8. Inheritance Biology

In cats, blood-type A results from an allele (IA) that is dominant over an allele (iB) that produces blood-type B. There is no O blood type. Two heterozygous was intercross. What is the probability of first offspring blood-type B?