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TLS Online TPP Program

#Question id: 14829

A new drug is developed that inhibits formation of the flagellar filament by impairing production of the protein flagellin. Is this going to be a good drug?

#Microbiology
  1. Potentially-it would definitely only impair bacteria, but wouldn't matter for the ones that don't use a flagellum to move around.
  2. Potentially-if it could be shown that it also didn't impair the production of the eukaryotic flagellum.
  3. No-our eukaryotic cells depend on flagella to move around in our body, and this would impair that function.
  4. No-bacterial flagella are produced using microtubules, not the protein flagellin. This drug would be useless in eliminating bacteria.
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TLS Online TPP Program

#Question id: 5427

#Genetics

In a plant, height is control by three quantitative trait loci.  Each dominant additive allele is contributing 3 cm height in plant. Maximum expected plant height is 20 cm. What is minimum expected height? 
TLS Online TPP Program

#Question id: 5737

#Genetics

When an organism gains one extra copy of a chromosome but not a complete haploid set, the conditions is known as
TLS Online TPP Program

#Question id: 5738

#Genetics

It was once thought that the ____ karyotype was related to criminal disposition because it led to aggressive behavior due to excessive "maleness".
TLS Online TPP Program

#Question id: 5739

#Genetics

Polyploid plants found in nature usually have even numbers of chromosomes because organisms having odd numbers
TLS Online TPP Program

#Question id: 5740

#Genetics

Pollen from one species germinates on the stigma of another related species and sexually fertilizes the ovule. Most of the resulting plants are sterile but some of the resulting offspring undergo chromosome duplication resulting fertile plants. The fertile offspring are known as
TLS Online TPP Program

#Question id: 5741

#Genetics

In a mammal 2 Barr bodies are observed.  How many X chromosomes does the organism have?