Insulin has an AB heterodimer structure with intrachain  and interchain disulfide bridges  such as___

I- One intrachain disulfide bridges (A6-A11) 

II- Two interchain disulfide bridges (A7-B7 and A20-B19)

III- two intrachain disulfide bridges (A6-A11 and A20-B19) 

IV- one interchain disulfide bridges (A7-B7 )

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#Question id: 4754

#Unit 8. Inheritance Biology

Allele A is epistatic to allele B. Which of the following statement are incorrect?

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#Question id: 5345

#Unit 8. Inheritance Biology

Which of the following above is most probable mode of inheritance?

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#Question id: 2704

#Unit 2. Cellular Organization

Which of the following regions promote histone – DNA association?

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#Question id: 16125

#Unit 13. Methods in Biology

You are studying regulation of the yeast enzyme glutamine synthetase (GS), which is encoded by the GLN1 gene. You have isolated two mutants, designated gln2– and gln3–, that give decreased GS activity. Mating of either gln2– or gln3– haploids to wild type produces heterozygous diploids that show normal amounts of GS expression. When you cross either a gln2– or gln3– haploid to a gln1– strain the resulting diploids show normal expression of GS.              

From these experiments,  Classify  the  gln2– and gln3– mutations in terms of their basic genetic properties explaining the rationale behind your conclusions. Based on these properties make a proposal for the types of regulatory functions affected by the gln2– and gln3– mutations.

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#Question id: 10471

#Unit 6. System Physiology – Plant

Under temperate conditions, which one of the two major factors that are involved with light-dependent stomatal opening are,