TLS Online TPP Program

#Question id: 1532


For a particular microarray assay (DNA chip), cDNA has been made from the mRNAs of a dozen patients' breast tumor biopsies. Which of the following types of evidence will researchers be looking for in order to determine if the cells are cancerous?

#Unit 4. Cell Communication and Cell Signaling
  1. a particular gene that is amplified in all or most of the patient samples

  2. a pattern of fluorescence that indicates which cells are over proliferating

  3. a pattern shared among some or all of the samples that indicates gene expression differing from control samples

  4. a group of cDNAs that match those in non-breast cancer control samples from the same population

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TLS Online TPP Program

#Question id: 7303

#Unit 5. Developmental Biology

The ‘quartet model’ explains how the protein products of the ABCE-function genes might interact to control floral organ identity. Following statements are based on this model. Which one of them is incorrect?

TLS Online TPP Program

#Question id: 7302

#Unit 5. Developmental Biology

Match the following level of microRNAs in Arabidopsis (Column II and III) with their Phases (Column I)

   Phases (Column I)

 microRNAs (Column II)

Level of microRNAs (Column III)

A. Juvenile vegetative phase

i. miR156

a. Low

B. Adult vegetative phase

ii. miR172

b. High

C. Reproductive phase

 

 

Which of the following combination is correct?

TLS Online TPP Program

#Question id: 7301

#Unit 5. Developmental Biology

An Rajasthani hunter was worried about being attacked by grizzly tigers, so he left the lights in his cabin on all the time. Plants near the cabin flowered a month early. Which of the following best explains this?

TLS Online TPP Program

#Question id: 7299

#Unit 5. Developmental Biology

Maintenance of the shoot meristems in adult Arabidopsis plants relies on which of the following mechanisms?

TLS Online TPP Program

#Question id: 7297

#Unit 5. Developmental Biology

How is the ABC model for floral identity in Arabidopsis similar to the models for homeotic gene function derived from studies in Drosophila?

TLS Online TPP Program

#Question id: 7295

#Unit 5. Developmental Biology

If a long-day plant has a critical night length of 9 hours, which 24-hour cycle would prevent flowering? (SS)