TLS Online TPP Program

#Question id: 4143


It is possible to convert the Cys that is a part of Cys-tRNACys to Ala by a catalytic reduction.  If the resulting Ala-tRNACys were added to a mixture of (1) ribosomes, (2) all the other tRNAs and amino acids, (3) all of the cofactors and enzymes needed to make protein in vitro, and (4) mRNA for hemoglobin, where in the newly synthesized hemoglobin would the Ala from Ala-tRNACys be incorporated?

#Section 3: Genetics, Cellular and Molecular Biology
  1. Nowhere; this is the equivalent of a nonsense mutation

  2. Wherever Ala normally occurs

  3. Wherever Cys normally occurs

  4. Wherever either Ala or Cys normally occurs

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TLS Online TPP Program

#Question id: 2967

#Section 3: Genetics, Cellular and Molecular Biology

G1 is associated with which of the following cellular events?

TLS Online TPP Program

#Question id: 2968

#Section 3: Genetics, Cellular and Molecular Biology

What is the name of the microtubule-organizing center found in animal cells as an identifiable structure present during all phases of the cell cycle?

TLS Online TPP Program

#Question id: 2976

#Section 3: Genetics, Cellular and Molecular Biology

Match the following Regulators with its functions.

Column I

Column II

A.  Wee1 kinase

i. Degradation of phosphorylated Sic1 or p27KIP1

B. Cdc25A phosphatase

ii. Induces degradation of B-type cyclins

C. APC/CCdc20

iii. Activates vertebrate S phase CDKs

D. SCF

iv. Inhibits CDKs

Which of the following is correct?

TLS Online TPP Program

#Question id: 2987

#Section 3: Genetics, Cellular and Molecular Biology

Following statements are regarding the goals of gap phases.

(i) to prepare for the next phase of the cell cycle.

(ii) to check that the previous phase of the cell cycle has been completed appropriately.

(iii) to inhibits CDKs activity.

(iv) to enhance servillance mechanisms.

Which of the following is correct?

TLS Online TPP Program

#Question id: 2994

#Section 3: Genetics, Cellular and Molecular Biology

If a cell has completed meiosis I and the first cytokinesis, and is just beginning meiosis II, which of the following is an appropriate description of its genetic contents?

TLS Online TPP Program

#Question id: 2995

#Section 2: General Biology

 Which of the following incorrect pair?