Practice Questions

  1. Home
  2. Free Resources
  3. Practice Questions
  4. 5085
TLS Online TPP Program

#Question id: 5298

Four E. coli strains of genotype a+ b− are labeled 1, 2, 3, and 4. Four strains of genotype a− b+ are labeled 5, 6, 7, and 8. The two genotypes are mixed in all possible combinations and (after incubation) are plated to determine the frequency of a+ b+ recombinants. The following results are obtained, where M = many recombinants, L = low numbers of recombinants, and 0 = no recombinants. On the basis of these results, assign a sex type (either Hfr, F+, or F−) to each strain

#Unit 8. Inheritance Biology

  1. Thus strains 2, 3, 4 and 7 are F−. Strains 1 and 8 are F+, and strains 5, and 6 are Hfr.

  2. Thus strains  3, and 7 are F−. Strains 1, 2 and 8 are F+, and strains 4, 5, and 6 are Hfr.

  3. Thus strains 2, 3, and 7 are F−. Strains 1, 6 and 8 are F+, and strains 4 and 5 are Hfr.

  4. Thus strains 2, 3, and 7 are F−. Strains 1 and 8 are F+, and strains 4, 5, and 6 are Hfr.

More Questions
TLS Online TPP Program

#Question id: 28444

#Unit 5. Developmental Biology

Six of precursor blast cells (P cells) persist in the larva in a row aligned antero-posteriorly on the ventral side of the larva, and posterior daughters of three of these precursor blast cells (P cells) give rise to the vulva. these precursor cells are___
TLS Online TPP Program

#Question id: 28445

#Unit 5. Developmental Biology

 In C. elegans Formation of the vulva occurs during the larval stage from six cells is called_____
TLS Online TPP Program

#Question id: 28446

#Unit 5. Developmental Biology

The cell connecting the overlying gonad to the vulval precursor cells is called Anchor cell, which secretes a paracrine factor that has the ability to activate a pathway by binding this factor on to the VPCs.
I-paracrine factor
II-activates Pathway
Find out the correct match ?
TLS Online TPP Program

#Question id: 28447

#Unit 5. Developmental Biology

 During induction anchor cell secrets a paracrine factor LIN-3 protein is similar to which of the following mammalian growth factor?
TLS Online TPP Program

#Question id: 28448

#Unit 5. Developmental Biology

The anchor cell normal function is to induce VPCs to achieve their fate. During an experiment mutated lin-3 gene due to this mutation anchor cell is destroyed, what kind of outcomes will be seen after mutation? 
TLS Online TPP Program

#Question id: 28449

#Unit 5. Developmental Biology

In C. elegans during embryogenesis, an anchor cell and 6 hypodermal vulval precursor cells (VPCs) get involved in forming the vulva. Which of the following statement is incorrect about  VPCs?