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TLS Online TPP Program

#Question id: 1580

Advantages of Toxoid (inactivated exotoxin) can be

#SCPH01 Biochemistry

  1. Stable; safer than live vaccines; refrigerated storage not required

  2. Immune system becomes primed to recognize bacterial toxins

  3. Strong humoral and cellular immune response; relatively inexpensive to manufacture

  4. Mimics natural infection, resulting in strong immune response

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TLS Online TPP Program

#Question id: 15756

#SCPH05 I Biotechnology

Synthetic seeds are produced by the encapsulation of somatic embryos with ___________.
TLS Online TPP Program

#Question id: 15757

#SCPH05 I Biotechnology

Which of the following growth hormones produces apical dominance?
TLS Online TPP Program

#Question id: 15758

#SCPH05 I Biotechnology

Adsorbants like activated charcoal or PVP (polyvinylpyrrolidon) may be used as adsorbant to prevent
TLS Online TPP Program

#Question id: 15759

#SCPH05 I Biotechnology

Somatic hybrids exhibit the full somatic complement of one parental species, while all or nearly all chromosomes of the other parental species are lost during the preceding mitotic divisions; such hybrids arc referred to as
TLS Online TPP Program

#Question id: 15817

#SCPH01 Biochemistry

You and your lab partner have isolated 20 new mutant yeast strains that are defective in synthesis of threonine, an amino acid. These Thr- mutants do not grow on minimal medium, but they do grow on minimal medium supplemented with threonine. Ten of your Thr- mutants (numbered 1 through 10) were isolated in a strain of mating type a (MAT a). The other 10 Thrmutants (numbered 11 through 20) were isolated in a strain of mating type α (MAT α). You and your lab partner cross each of the MAT a strains to each of the MAT α strains, and you include crosses to the appropriate wild-type strains. Your experimental observations are shown in the table below, where (-) indicates diploids that did not grow on minimal medium and (+) indicates diploids that did grow on minimal medium

Based on these experiments, what is the minimum number of genes required for threonine synthesis?
TLS Online TPP Program

#Question id: 15817

#SCPH12 I Genetics

You and your lab partner have isolated 20 new mutant yeast strains that are defective in synthesis of threonine, an amino acid. These Thr- mutants do not grow on minimal medium, but they do grow on minimal medium supplemented with threonine. Ten of your Thr- mutants (numbered 1 through 10) were isolated in a strain of mating type a (MAT a). The other 10 Thrmutants (numbered 11 through 20) were isolated in a strain of mating type α (MAT α). You and your lab partner cross each of the MAT a strains to each of the MAT α strains, and you include crosses to the appropriate wild-type strains. Your experimental observations are shown in the table below, where (-) indicates diploids that did not grow on minimal medium and (+) indicates diploids that did grow on minimal medium

Based on these experiments, what is the minimum number of genes required for threonine synthesis?