TLS Online TPP Program

#Question id: 5253


In a hypothetical situation, the genes for sex pilus construction and for tetracycline resistance are located together on the same plasmid within a particular bacterium. If this bacterium readily performs conjugation involving a copy of this plasmid, then the resultshould be

#SCPH05 I Biotechnology
  1. a transformed bacterium.

  2. the rapid spread of tetracycline resistance to other bacteria in that habitat.

  3. the subsequent loss of tetracycline resistance from this bacterium.

  4. the production of endospores among the bacteriumʹs progeny.

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TLS Online TPP Program

#Question id: 2988

#SCPH06 I Botany

Use the figure to answer the question below. 

If the cell whose nuclear material is shown in the figure continues toward completion of mitosis, which of the following events would occur next?

TLS Online TPP Program

#Question id: 2989

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

Use the figure to answer the question below.

In the figure, G1 is represented by which numbered part(s) of the cycle?

TLS Online TPP Program

#Question id: 2989

#SCPH06 I Botany

Use the figure to answer the question below.

In the figure, G1 is represented by which numbered part(s) of the cycle?

TLS Online TPP Program

#Question id: 2990

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

Mitotic CDK complexes are maintained in an inactive state through inhibitory phosphorylation of the CDK subunit. Two highly conserved tyrosine and threonine residues in mammalian CDKs are subject to regulated phosphorylation.

Gene

  Mutant phenotypes

A. Wee1

i. the cell does not divide but continues to grow

B. CAK kinase

ii. mitotic cyclins are inactivated

C. cdc25 phosphatase

iii. premature entry into mitosis

The following table enlists genes and phenotypes observed on mutation of these genes but not correctly matched. Which one of the following combinations is correctly matched ?

TLS Online TPP Program

#Question id: 2990

#SCPH06 I Botany

Mitotic CDK complexes are maintained in an inactive state through inhibitory phosphorylation of the CDK subunit. Two highly conserved tyrosine and threonine residues in mammalian CDKs are subject to regulated phosphorylation.

Gene

  Mutant phenotypes

A. Wee1

i. the cell does not divide but continues to grow

B. CAK kinase

ii. mitotic cyclins are inactivated

C. cdc25 phosphatase

iii. premature entry into mitosis

The following table enlists genes and phenotypes observed on mutation of these genes but not correctly matched. Which one of the following combinations is correctly matched ?

TLS Online TPP Program

#Question id: 2991

#SCPH06 I Botany

Early observations of a cultured cell line indicated that the cells did not exhibit either density-dependent inhibition or anchorage dependence. What do these observations suggest about this cell line?