TLS Online TPP Program

#Question id: 1273


Proteoglycans are a group of cell-surface and extracellular-matrix substances that

#Unit 4. Cell Communication and Cell Signaling
  1. are highly positively charged.           

  2. have a molecular weight less than 1000.

  3. may contain heparan sulfate as a constituent.

  4. bind to collagens and fibronectin.

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TLS Online TPP Program

#Question id: 29574

#Unit 6. System Physiology – Plant

Some of the following statement are given regarding ToxA gene  
a. It produced by Stagonospora nodorum cause glume blotch and tan spot disease
b. encodes a 13‐ kDa polypeptide
c. stimulates host cell death in a light dependent manner
d. stimulates host cell death in a dark dependent manner

Which of the following is true regarding TMV

TLS Online TPP Program

#Question id: 1325

#Unit 4. Cell Communication and Cell Signaling

What is the main purpose of gap junctions?

TLS Online TPP Program

#Question id: 12495

#Unit 8. Inheritance Biology

Haemophilia A is a severe coagulation disorder that shows X-linked recessive inheritance. Red-green colour blindness also shows X-linked recessive inheritance. A man with both haemophilia A and colour blindness is referred for genetic counseling. Assume that his partner is not a carrier of either of these conditions. Which of the following is correct?

TLS Online TPP Program

#Question id: 1405

#Unit 4. Cell Communication and Cell Signaling

A gain-of-function mutation in which of the following would have the same effect as a gain-of-function mutation in Ras?

TLS Online TPP Program

#Question id: 14740

#Unit 4. Cell Communication and Cell Signaling

Rod cells sense light with the aid of a light-sensitive GPCR known as rhodopsin; choose incorrect statements
a. Rhodopsin consists of the protein opsin, which has the usual seven–transmembrane segment GPCR structure, covalently linked to a light-absorbing pigment called retinal. 
b. Rhodopsin, found only in rod cells, is localized to the thousand or so flattened membrane disks that make up the inner segment of each of these rod-shaped cells.
c. A human rod cell contains about 4 × 107 molecules of rhodopsin. 
d. The heterotrimeric G protein coupled to rhodopsin, called transducin (Gt), contains a Gα unit referred to as Gαt; like rhodopsin, Gαt is found only in rod cells.