Practice Questions

  1. Home
  2. Free Resources
  3. Practice Questions
  4. 8614
TLS Online TPP Program

#Question id: 11832

Ethylene production and action can be inhibited by various types of inhibitors, some statements about  the inhibitor is given below, which one of the following is incorrect?

#Unit 6. System Physiology – Plant
  1. The cobalt ion (Co2+) is an inhibitor of the ethylene biosynthetic pathway, blocking the conversion of ACC to ethylene by ACC oxidase
  2. Silver ions (Ag+) applied as silver nitrate (AgNO3) or as silver thiosulfate (Ag(S2O3)23-) are potent inhibitors of ethylene action
  3. The volatile compound cis-cyclooctene, but not its isomer trans-cyclooctene, is a strong competitive inhibitor of ethylene binding
  4. A novel inhibitor 1-methylcyclopropene (MCP), was recently found that binds almost irreversibly to the ethylene receptor
More Questions
TLS Online TPP Program

#Question id: 3051

#Unit 2. Cellular Organization

You have 10^10 cell/L of bacterial stock solution. To prepare 1 liter of growth medium containing 1000 bacteria, the volume in microlitre of this stock solution that should be added is
TLS Online TPP Program

#Question id: 5783

#Unit 8. Inheritance Biology

Which of the following genetic diseases results from a mutation that prevents a protein from forming?
TLS Online TPP Program

#Question id: 12521

#Unit 6. System Physiology – Plant

Which of the following enzyme of ABA biosynthesis function as a rate limiting enzyme?
TLS Online TPP Program

#Question id: 19291

#Unit 9. Diversity of Life Forms

Reptilian embryos are protected from desiccation by a leathery shell. Similarly, which pair of structures protects seed plantsʹ embryos and male gametophytes, respectively, from desiccation? 
TLS Online TPP Program

#Question id: 12508

#Unit 8. Inheritance Biology

In this pedigree I 1 and II 2 have Becker muscular dystrophy which shows X-linked recessive inheritance. III 2 has oculocutaneous albinism which shows autosomal recessive inheritance with an incidence in the general population of 1 in 10 000. The disease status for both Becker muscular dystrophy and oculocutaneous albinism is unknown for IV 1 and IV 2.
What is the probability that III 3 is a carrier of oculocutaneous albinism?