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TLS Online TPP Program

#Question id: 2850

CCA-adding enzymes add a specific sequence without a template because

#Unit 2. Cellular Organization

  1. CCA-adding enzymes have two active site that uses a similar two-metal ion mechanism of catalysis

  2. It only recognise A and C

  3. It only recognise G and U

  4. Specificity for the addition of C versus A is not controlled by changes in the active site as each base is added

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TLS Online TPP Program

#Question id: 28433

#Unit 5. Developmental Biology

Which of the following activity is first morphological sign of gastrulation in amniotes?
TLS Online TPP Program

#Question id: 28434

#Unit 5. Developmental Biology

Primitive Streak is homologous to_____
TLS Online TPP Program

#Question id: 28435

#Unit 5. Developmental Biology

Primitive Streak is first arises from which area or cells?
TLS Online TPP Program

#Question id: 28436

#Unit 5. Developmental Biology

Primitive Groove is____
TLS Online TPP Program

#Question id: 28437

#Unit 5. Developmental Biology

Primitive groove is homologous to_____
TLS Online TPP Program

#Question id: 28438

#Unit 5. Developmental Biology

A regional thickening of cells at the anterior end of the primitive streak is termed____
a) Hensen’s node 
b) Primitive Knot
c) Primitive Groove
d) Primitive pit