Practice Questions

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#Question id: 450

The DG'° values for the two reactions shown below are given.

Oxaloacetate + acetyl-CoA + H2O -> citrate + CoASH DG'° = –32.2 kJ/mol

Oxaloacetate + acetate -> citrate DG'° = –1.9 kJ/mol

What is the DG'° for the hydrolysis of acetyl-CoA?

Acetyl-CoA + H2O -> acetate + CoASH + H+

#Unit 1. Molecules and their Interaction Relevant to Biology

–34.1 kJ/mol
–32.2 kJ/mol
–30.3 kJ/mol
+61.9 kJ/mol

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#Question id: 4079

#Unit 3. Fundamental Processes

What is the evidence that pre-mRNAs are not synthesized unless machinery for processing is properly positioned?

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#Question id: 7208

#Unit 5. Developmental Biology

Following statements are given about cleavage in drosophila.

A. During the ninth division cycle, approximately five nuclei reach the surface of the anterior pole of the embryo. These nuclei become enclosed by cell membranes and generate the pole cells that give rise to the gametes of the adult.

B. During tenth division of cycle, the other nuclei migrate to the cortex (periphery) of the egg and at this stage, embryo is called a syncytial blastoderm .

C. When the nuclei reach the periphery of the egg during the tenth cleavage cycle, each nucleus becomes surrounded by microtubules and microfilaments. The nuclei and their associated cytoplasmic islands are called transmembrane.

D. Following division cycle 13, the cell membrane (which had covered the egg) folds inward between the nuclei, eventually partitioning off each energid into a single cell. This process creates the cellular blastoderm.

Which of the following combination are correct?

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#Question id: 12385

#Unit 7. System Physiology – Animal

To evaluate kidney function in a 45-year-old woman with type II diabetes, you ask her to collect her urine over 24 hours. She collects 3600 ml of urine in that period. The clinical laboratory returns the following results after analyzing the patient’s urine and plasma samples: plasma creatinine = 4 mg/dL, urine creatinine = 32 mg/dL, plasma potassium = 5 mmol/L, and urine potassium = 10 mmol/L.

What is the net renal tubular reabsorption rate of potassium in this patient?

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#Question id: 916

#Unit 1. Molecules and their Interaction Relevant to Biology

The role of hormone-sensitive triacylglycerol lipase is to:

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#Question id: 11533