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#Question id: 1529

Which of the following statements are true regarding to gain-of-function and loss-of-function mutations with respect to cancer.

#Unit 4. Cell Communication and Cell Signaling

  1. A gain-of-function mutation converts a proto-oncogene into an oncogene. Such mutations are dominant and require alteration of single allele. A loss-of-function mutation occurs in tumor-suppressor genes, abrogating their function in preventing cancer. Such mutations are recessive and require alteration of both alleles.

  2. A gain-of-function mutation converts a proto-oncogene into an oncogene. Such mutations are dominant and require alteration of both alleles. A loss-of-function mutation occurs in tumor-suppressor genes, abrogating their function in preventing cancer. Such mutations are recessive and require alteration of single allele.

  3. A gain-of-function mutation occurs in tumor-suppressor genes. Such mutations are dominant and require alteration of single allele. A loss-of-function mutation converts a proto-oncogene into an oncogene, abrogating their function in preventing cancer. Such mutations are recessive and require alteration of both alleles.

  4. A gain-of-function mutation occurs in tumor-suppressor genes. Such mutations are dominant and require alteration of both alleles. A loss-of-function mutation converts a proto-oncogene into an oncogene, abrogating their function in preventing cancer. Such mutations are recessive and require alteration of single allele.

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TLS Online TPP Program

#Question id: 9283

#Unit 6. System Physiology – Plant

Organization of the protein complexes the photosystems I and II Are spatially separated in the thylakoid membrane, choose the correct arrangement of PSI and PSII on the membrane ;

a.) The PSI reaction centre and its associated antenna pigments and electron transfer proteins, as well as the coupling-factor enzyme that catalyzes the formation of ATP, are found almost exclusively in the stroma lamellae and at the edges of the grana lamellae

b.) The PSI reaction centre, along with its antenna chlorophylls and associated electron transport proteins, is located predominantly in the stromal lamellae

c.) The PSII reaction centre and its associated antenna pigments and electron transfer proteins, as well as the coupling-factor enzyme that catalyzes the formation of ATP, are found almost exclusively in the stroma lamellae and at the edges of the grana lamellae

d.) The PSII reaction centre, along with its antenna chlorophylls and associated electron transport proteins, is located predominantly in the grana lamellae

Which of the following given combination correct?
TLS Online TPP Program

#Question id: 28220

#Unit 5. Developmental Biology

The ability of a cells to form all structures of an organisms, embryonic as well as extra embryonic cells is called__
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#Question id: 16326

#Unit 7. System Physiology – Animal

What are adaptations?
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#Question id: 15608

#Unit 12. Applied Biology

Melanins are light-absorbing biopolymers useful as topical sunscreens, sunlight-protective coatings for plastics, etc. Which gene is used for producing melanin. 
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#Question id: 2720

#Unit 2. Cellular Organization

In one strand of a double stranded DNA the rate of occurrence of A is 3 times C in consecutive 10 bases. So how many G will be there in 100 base pairs of a DNA duplex? [Consider G=T in one strand].