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TLS Online TPP Program

#Question id: 1434

A bone tumor sample appears to be heterozygous for a p53 mutation. The most likely explanation for this finding is:

#Biochemistry

  1. Mutated p53 is an oncogene.

  2. The p53 mutation is resulting in a dominant negative p53 protein.

  3. The p53 mutation is resulting in a premature stop codon, and no functional protein is made from that allele.

  4. There was a mistake in labeling the tissue sample—all tumors musts lack p53.

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TLS Online TPP Program

#Question id: 37884

#Plant Biotechnology

Statement I: Immobilization of cells often alters their cellular physiology compared to cells grown in suspension culture.
Statement II: Due to physiological changes, immobilized cell systems are widely preferred for all types of plant studies, including genetic and developmental studies.

Choose the correct answer:
TLS Online TPP Program

#Question id: 37885

#Plant Biotechnology

Assertion (A): Plant cell and tissue cultures can be maintained indefinitely.
Reason (R): Serial subculturing is performed to transfer tissues to fresh medium to counter nutrient depletion and medium drying.

Select the correct option:
TLS Online TPP Program

#Question id: 37886

#Plant Biotechnology

Column I (Hormone)Column II (Function)
A. Auxin1. Inhibition of leaf senescence
B. Cytokinin2. Maturation of somatic embryo
C. Gibberellin (GA)3. Inhibition of axillary bud outgrowth (Apical Dominance)
D. Abscisic Acid (ABA)4. Fruit ripening
E. Ethylene5. Release from dormancy (Seeds/Buds)
TLS Online TPP Program

#Question id: 37887

#Plant Biotechnology

Match the sucrose concentration in Column I with the type of vascular tissue favored in Column II.

Column I (Sucrose Conc.)Column II (Differentiation Result)
A. 1%1. Mostly Phloem
B. 2%2. Both Xylem and Phloem
C. 2.5% – 3.5%3. Little Xylem
D. 4%4. Mostly Xylem
TLS Online TPP Program

#Question id: 37888

#Plant Biotechnology

Assertion (A): Tracheary element differentiation is considered an irreversible process. 
Reason (R): During differentiation, the cells lose their nuclei and cytoplasm, preventing dedifferentiation or redifferentiation.

Select the correct option:
TLS Online TPP Program

#Question id: 37889

#Plant Biotechnology

Consider the following statements regarding vascular differentiation:
1. Auxin is the principal limiting factor for vascular differentiation.
2. Gibberellic Acid (GA) is essential for the differentiation of phloem.
3. Lower levels of NH4+ and NO3- inhibit vascularization.
4. A high Cytokinin : Auxin ratio can promote both xylem and phloem differentiation.

Which of the statements given above are CORRECT?