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TLS Online TPP Program

#Question id: 1998

Jenner successfully used cowpox virus as a vaccine against the virus that causes smallpox. Why was he successful even though he used viruses of different kinds?

#Unit 4. Cell Communication and Cell Signaling

  1. The immune system responds nonspecifically to antigens.

  2. The cowpox virus made antibodies in response to the presence of smallpox.

  3. Cowpox and smallpox are antibodies with similar immunizing properties.

  4. There are some antigenic determinants common to both pox viruses.

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TLS Online TPP Program

#Question id: 15900

#Unit 12. Applied Biology

During development of a somatic embryo from a single superficial cell of the explant, the cells of this meristematic mass continue to divide to give rise to the various stages of SEs. Which of the following is considered correct for the development of SEs?
TLS Online TPP Program

#Question id: 15901

#Unit 12. Applied Biology

The following features are included between the shoot buds and somatic embryo;

                                                                             FEATURES

A) SHOOT BUD                                 i) Originated from the many cells, usually superficial

B) SOMATIC EMBRYO                        ii) Polarity is defined as bipolar; both shoot and root poles present
                                                        iii) Vascular strands connected with those present in callus/explant
                                                       iv) Easily separated from the callus/explant
                                                        v) There is no vascular connection with callus/explant
Which of the following correctly represents the features of  shoot buds and somatic embryo?
TLS Online TPP Program

#Question id: 15902

#Unit 12. Applied Biology

The pair of hormones required for a callus to differentiate are____
TLS Online TPP Program

#Question id: 15903

#Unit 12. Applied Biology

Protoplast can be produced from suspension cultures, callus tissues or intact tissues by enzymatic treatment with
TLS Online TPP Program

#Question id: 15904

#Unit 12. Applied Biology

If the cell arc treated with 0.01% solution of FDA, what will be the effect on live cell?
TLS Online TPP Program

#Question id: 15905

#Unit 12. Applied Biology

Meristemoids are considered to arise in areas that accumulate polysaccharide, which is believed to serve as an energy source for shoot bud differentiation