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TLS Online TPP Program

#Question id: 1297

What effect might an injection of RGD peptide have on tumor cells moving through the blood/lymph system?

#SCPH06 I Botany

  1. block cell attachment to new tissue and therefore prevent metastasis

  2. encourage clumping of cancer cells for removal by the immune system

  3. promote tumor cell binding to platelets and potentially lead to a fatal clot

  4. block integrin-mediated cell cycle progression

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TLS Online TPP Program

#Question id: 15376

#SCPH06 I Botany

If a protein made up of three subunit α2βγ (Mr. of α = 25000, β = 50000, γ = 75000) which of the following correctly representing SDS and Native (buffer) gel
TLS Online TPP Program

#Question id: 2966

#I Life Science/ Life Sciences Group – I-V

Scientists isolate cells in various phases of the cell cycle. They isolate a group of cells that have 1 1/2 times more DNA than G1 phase cells. What is the most likely part of the cell cycle from which these cells were isolated?
TLS Online TPP Program

#Question id: 2636

#SCPH01 Biochemistry

Which of the following events occur when E. coli is starved for tryptophan?

I.  The ribosome translates leader peptide completely

II. Transcription reads through attenuator into trp EDCBA

III. Tryptophanyl tRNA is not formed

IV. A stem loop structure involving regions 3 and 4 is formed at attenuator site
TLS Online TPP Program

#Question id: 1573

#SCPH01 Biochemistry

Which cells and which signaling molecules are responsible for initiating an inflammatory response?
TLS Online TPP Program

#Question id: 4311

#SCPH06 I Botany

At the beginning of this century, there was a general announcement regarding the sequencing of the human genome and the genomes of many other multicellular eukaryotes. Many people were surprised that the number of protein-coding sequences was much smaller than they had expected. Which of the following types of DNA make up the rest of the human genome?