Practice Questions

TLS Online TPP Program

#Question id: 20324

What is the main difference between Gram positive and Gram-negative quorum sensing mechanism?

#Unit 4. Cell Communication and Cell Signaling

Gram-negative bacteria use mainly peptides while Gram-positive bacteria use predominantly N-acyl homoserine lacton (AHL) molecules
Gram-negative bacteria use predominantly N-acyl homoserine lacton (AHL) molecules while Gram-positive bacteria use mainly peptides.
Gram-negative bacteria use mainly peptides while Gram-positive bacteria use predominantly autoinducer-1, AI-1.
Gram-positive bacteria is more resistance to antibiotics than Gram- negative.

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TLS Online TPP Program

#Question id: 8900

#Unit 9. Diversity of Life Forms

Which of the following statements about craniates is (are) correct?

1. Craniates are more highly cephalized than are non-craniates.

2. Craniatesʹ genomic evolution includes duplication of clusters of genes that code for transcription factors.

3. The craniate clade is synonymous with the vertebrate clade.

4. Pharyngeal slits that can assist in gas exchange originated in craniates,

5. The two-chambered heart originated with the early craniates.

TLS Online TPP Program

#Question id: 5222

#Unit 11. Evolution and Behavior

When does exon shuffling occur?

TLS Online TPP Program

#Question id: 26351

#Unit 2. Cellular Organization

MAR fragments are usually

TLS Online TPP Program

#Question id: 13147

#Unit 8. Inheritance Biology

A cross was made between pure Blue and long pollen length with white and short pollen length. The F1 were test crossed. The F2 progeny obtained was as follows:

The genetic distance (cM) between flower colour and pollen length is;

TLS Online TPP Program

#Question id: 2159

#Unit 2. Cellular Organization

A channel protein