Although some citric acid cycle enzymes operate primarily in the mitochondria, malate dehydrogenase operates in both the cytosol and the mitochondria. Match each function to cytosolic malate dehydrogenase or mitochondrial malate dehydrogenase.

A. Cytosolic malate dehydrogenase

B. Mitochontrial malate dehydrogenase

1. transfers reducing equivalents from cytosolic NADH to a molecule that can tranverse the inner mitochondrial membrane

2. generates mitochontrial NADH from reducing equivalents that originate in the cytosol

3. reduces oxaloacetate to malate

4. oxidizes malate to oxaloacetate

5. reduces NAD+ to NADH

6. oxidezes NADH produced in glycosis to NAD+

7. catalyzes last reaction in citric acid cycle that regenrates oxaloacetate( ▲G = 29.7kJ/mol)

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assuming that your periodic table has eighteen columns, you should highlight   the four elements in the third column from the left of the table.

neutral atoms of elements after calcium contain d electrons. the energy of d orbitals of a particular main shell lies between the energy of the s and p orbitals of the next main shell. for example, electrons in the have energy higher than those in the orbital while lower than those of the orbital.

by the aufbau principle, electrons fill orbitals one at a time, starting from those of the lowest energy. the orbital is therefore filled right after orbitals and before orbitals.  

potassium has electron configuration and calcium . the s orbital of a main shell holds a maximum of two electrons. the next element would thus have the electron configuration and satisfy the requirements.

a neutral atom of the element contains three electrons on top of the most recent noble gas element. it should thus be placed in the third column of the periodic table. both scandium and yttrium would satisfy the conditions. an aufbau diagram indicates that the 4f orbital is filled before the 5d. however, it appears that exceptions exists for both lanthanum and actinium. neutral atoms of the two d-block elements also demonstrate the and should be highlighted as well.