TLS Online TPP Program

#Question id: 2640


Which of these properties do not agree with trp operon attenuator?

#SCPH28 | Zoology
  1. It brings about repression of trp operon

  2. It consists of one stem loop system

  3. It has two codons for tryptophan in sequence

  4. Ribosome stalls at the attenuator

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TLS Online TPP Program

#Question id: 4941

#SCPH06 I Botany

Which of the factors below weaken the hypothesis of abiotic synthesis of organic monomers in early Earthʹs atmosphere?

1.  the relatively short time between intense meteor bombardment and appearance of the first life forms

2.  the lack of experimental evidence that organic monomers can form by abiotic synthesis

3.  Uncertainty about which gases comprised early Earthʹs atmosphere

TLS Online TPP Program

#Question id: 4941

#SCPH28 | Zoology

Which of the factors below weaken the hypothesis of abiotic synthesis of organic monomers in early Earthʹs atmosphere?

1.  the relatively short time between intense meteor bombardment and appearance of the first life forms

2.  the lack of experimental evidence that organic monomers can form by abiotic synthesis

3.  Uncertainty about which gases comprised early Earthʹs atmosphere

TLS Online TPP Program

#Question id: 4942

#SCPH06 I Botany

Which of the following has not yet been synthesized in laboratory experiments studying the origin of life?

TLS Online TPP Program

#Question id: 4942

#SCPH28 | Zoology

Which of the following has not yet been synthesized in laboratory experiments studying the origin of life?

TLS Online TPP Program

#Question id: 4943

#SCPH06 I Botany

In what way were conditions on the early Earth of more than 3 billion years ago different from those on todayʹs Earth?

TLS Online TPP Program

#Question id: 4943

#SCPH28 | Zoology

In what way were conditions on the early Earth of more than 3 billion years ago different from those on todayʹs Earth?