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TLS Online TPP Program

#Question id: 2984

Certain unicellular eukaryotes, including diatoms and some yeasts, have mechanisms of nuclear division that may resemble intermediate steps in the evolution of mitosis. Which of the following is a characteristic feature of nuclear division in these organisms?

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

  1. They reproduce by binary fission in their early stages of development and by mitosis when they are mature.

  2. They have circular chromosomes that are segregated by a mitotic spindle.

  3. Chromosomes are segregated by a mitotic spindle, but the nuclear envelope remains intact during division.

  4. Chromosomes are segregated by attachment to the plasma membrane.

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TLS Online TPP Program

#Question id: 12939

#SCPH06 I Botany

Choose the incorrect statement for the production of site-directed mutations.
TLS Online TPP Program

#Question id: 4741

#SCPH12 I Genetics

The F2 progeny from a particular cross exhibit a modified dihybrid ratio of 9 : 7 (instead of 9 : 3 : 3 : 1). What phenotypic ratio would be expected from a testcross of the F1?
TLS Online TPP Program

#Question id: 5710

#SCPH28 | Zoology

This cytological analysis, chromosome (A) represents the normal condition and the centromere position. Assume that only one structural chromosome aberration occurs in the other chromosomes
TLS Online TPP Program

#Question id: 10950

#SCPH28 | Zoology

Presentation of antigen on MHC-I by a cell will result in
TLS Online TPP Program

#Question id: 4139

#SCPH05 I Biotechnology

Which one of the following statements about the elongation phase of protein synthesis is true?