Enzymes - Mock Test 51

Question 501

In TCA cycle, oxalosuccinate is converted to α-ketoglutarate by the enzyme?

A) Fumarase B) Isocitrate dehydrogenase C) Aconitase D) Succinase

---

No Details

Question 502

The reaction catalysed by α-ketoglutarate dehydrogenase in the citric acid cycle requires?

A) NAD B) NADP C) ADP D) ATP

---

No Details

Question 503

An enzyme of the citric acid cycle also found outside the mitochondria is?

A) Isocitrate dehydrogenase B) Citrate synthetase C) α-Ketoglutarate dehydrogenase D) Malate dehydrogenase

---

No Details

Question 504

The substance which may be considered to play a catalytic role in citric acid cycle is?

A) Oxaloacetate B) Isocitrate C) Malate D) Fumarate

---

No Details

Question 505

The initial step of the citric acid cycle is?

A) Conversion of pyruvate to acetyl-CoA B) Condensation of acetyl-CoA with oxaloacetate C) Conversion of citrate to isocitrate D) Formation of α -ketoglutarate catalysed by isocitrate dehydrogenase

---

No Details

Question 506

The enzymes of the citric acid cycle are located in?

A) Mitochondrial matrix B) Extramitochondrial soluble fraction of the cell C) Nucleus D) Endoplasmic reticulum

---

No Details

Question 507

Most major metabolic pathways are considered mainly either anabolic or catabolic Which of the following pathway is most correctly considered to be amphibolic?

A) Citric acid cycle B) Gluconeogenesis C) Lipolysis D) Glycolysis

---

No Details

Question 508

All the enzymes of glycolysis pathway are found in?

A) Extramitochondrial soluble fraction of the cell B) Mitochondria C) Nucleus D) Endoplasmic reticulum

---

No Details

Question 509

In the normal resting state of humans, most of the blood glucose burned as fuel is consumed by?

A) Liver B) Adipose tissue C) Muscle D) Brain

---

No Details

Question 510

Pyruvate dehydrogenase activity is inhibited by?

A) Mercury B) Zinc C) Calcium D) Sodium

---

No Details