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TLS Online TPP Program

#Question id: 4133

Which of the following statements about aminoacyl-tRNA synthetases is false?

#Section 3: Genetics, Cellular and Molecular Biology

  1. Some of the enzymes have an editing/proofreading capability.

  2. The enzyme attaches an amino acid to the 3' end of a tRNA.

  3. The enzyme splits ATP to AMP + PPi.

  4. The enzyme will use any tRNA species, but is highly specific for a given amino acid.

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TLS Online TPP Program

#Question id: 1923

#Section 2: General Biology

Which of the following is a diagnostic marker for tumors of the colon?
TLS Online TPP Program

#Question id: 1925

#Section 2: General Biology

 CD44 is a molecule that can be involved in:
TLS Online TPP Program

#Question id: 1926

#Section 2: General Biology

The normal immunological control of tumors is referred to as:
TLS Online TPP Program

#Question id: 1928

#Section 2: General Biology

Which of the following is a type of tumor that is NOT derived from hematopoietic cells?
TLS Online TPP Program

#Question id: 1929

#Section 2: General Biology

Which of the following is an example of an immune escape mechanism used by some tumor cells?
TLS Online TPP Program

#Question id: 1930

#Section 2: General Biology

Which of the following molecules are NOT used by tumor associated macrophages to generate an anti-inflammatory environment within a tumor?