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TLS Online TPP Program

#Question id: 4232

Once researchers identified DNA as the molecule responsible for transmitting heritable traits, they asked how information was transferred from the DNA in the nucleus to the site of protein synthesis in the cytoplasm. Which of the following statements correctly describes the mechanism of information transfer in eukaryotes that accomplishes this task?

#Unit 3. Fundamental Processes

  1. DNA from a single gene is replicated and transferred to the cytoplasm, where it serves as a template for protein synthesis.

  2. Messenger RNA is transcribed from a single gene and transfers information from the DNA in the nucleus to the cytoplasm, where protein synthesis takes place.

  3. Histone proteins in the chromosomes transfer information from the nucleus to the ribosome, where protein synthesis takes place.

  4. Transfer RNA takes information from DNA directly to a ribosome, where protein synthesis takes place.

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TLS Online TPP Program

#Question id: 23733

#Unit 8. Inheritance Biology

Phenotypic variation is analyzed for milk production in a herd of dairy cattle and the following variance components are obtained: Additive genetic variance= 0.4, Dominance genetic variance= 0.1, Genic interaction variance= 0.2, Environmental variance= 0.5, Genetic−environmental interaction variance= 0.0,  the heritability (H2) of milk production is___
TLS Online TPP Program

#Question id: 23734

#Unit 8. Inheritance Biology

The narrow-sense heritability of ear length in Reno rabbits is 0.4. The phenotypic variance (VP) is 0.8, and the environmental variance (VE) is 0.2. What is the additive genetic variance (VA) for ear length in these rabbits?
TLS Online TPP Program

#Question id: 23735

#Unit 8. Inheritance Biology

Phenotypic variation that is due to genetic differences is referred to as heritability. It can be the Broad-sense heritability and Narrow-sense heritability, the Broad-sense heritability which is ranges from 0 to 1. Identify the correct prediction about these ranges?
a) 0 is all of the phenotypic variance results from differences in genotype
b) 0 is all of the phenotypic variance results from environmental variation
c) 1 is all of the phenotypic variance results from differences in genotype
d) 1 is all of the phenotypic variance results from environmental variation
TLS Online TPP Program

#Question id: 23766

#Unit 7. System Physiology – Animal

The sensory receptors for vision are:
TLS Online TPP Program

#Question id: 23767

#Unit 7. System Physiology – Animal

The sensory receptors for vision are located on the:
TLS Online TPP Program

#Question id: 23768

#Unit 7. System Physiology – Animal

Which of the following cells function as photoreceptors?