An enzyme has a Vmax of 50 micromol product formed (minute x mg protein)-1 and a Km of 10 microM for the substrate. When a reaction mixture contains the enzyme and 5 microM substrate, which of the following percentages of the maximum velocity will be closest to the initial reaction rate?

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#Question id: 2006

#Section 2: General Biology

In Cases 1 and 2 in the table, the mothers would be able, if needed, to supply blood to the newborn even 7-9 months after birth; the same would not be true for Case 3. Why?

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#Question id: 2008

#Section 2: General Biology

An immune response to a tissue graft will differ from an immune response to a bacterium because

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#Question id: 2009

#Section 2: General Biology

A child is diagnosed with DiGeorge syndrome (DGS). With which of the following would the child have serious immunological problems?

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#Question id: 2010

#Section 2: General Biology

Which of the following might be a child with Brutonʹs disease?

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#Question id: 2011

#Section 2: General Biology

Brutonʹs disorder might occur because of which of the following molecular problems?

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#Question id: 2012

#Section 2: General Biology

The DGS-like phenotype can be produced in a specific knockout mouse for HA3, a Hox gene. HA3 is known to be involved in developmental regulation in the mouse. Which of the following would be an appropriate test for following the gene in the mouse progeny?