TLS Online TPP Program

#Question id: 4398


Which of the following are not found in DNA-binding proteins?

#Unit 3. Fundamental Processes
  1. homeodomains 

  2. zinc fingers    

  3. leucine zippers  

  4. CpG islands

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TLS Online TPP Program

#Question id: 22937

#Unit 5. Developmental Biology

Gene for regulatory pathway that promotes flowering of Arabidopsis in long days:

TLS Online TPP Program

#Question id: 7100

#Unit 5. Developmental Biology

If cells from the animal pole of a frog blastula (animal cap cells) are placed into contact with cells from the vegetal hemisphere, after removing the cells fated to form mesoderm, what is the result?

TLS Online TPP Program

#Question id: 22965

#Unit 7. System Physiology – Animal

Two osteoblast proteins responsible for osteoclast maturation; 
a. Receptor activator for nuclear factor κ-B ligand  
b. Macrophage colony-stimulating factor
c. Osteocalcin
d. Osteoprotegrin

TLS Online TPP Program

#Question id: 11589

#Unit 7. System Physiology – Animal

The body's reaction to parathyroid hormone (PTH), raising plasma levels of calcium, can be opposed by:

TLS Online TPP Program

#Question id: 16132

#Unit 13. Methods in Biology

You are running a human assisted reproduction clinic and providing state-of-the-art genetic diagnostic services. A married couple who already had a child with cystic fibrosis approach you because they wish to have another child, but only if they can be assured that the child will not have cystic fibrosis. You genotype the woman and discover that she is a heterozygote for Del508, the most common mutation causing cystic fibrosis. You suggest that the couple consider first polar body testing, in which several unfertilized oocytes (each with its first polar body) are retrieved from the woman, the first polar bodies are removed, and PCR tests are conducted on DNA from each of the first polar bodies. The couple agrees, and you obtain the following results:
 
the observation that the polar bodies for oocytes #1 and #5 test positive for both Del508 and the wild type sequence, because