Chapter 5 Online quizzes

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Select the most accurate sentence about essential and non-essential nutrients.

Nutrients are described as non-essential because our bodies do not require them to function properly correct incorrect

Nutrients are described as essential because our bodies are unable to produce them correct incorrect

The essential amino acids are the 20 amino acids that the human body needs to function properly correct incorrect

Omega-3 is a non-essential fatty acid correct incorrect

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Which of the following sentences accurately describes the role of a vitamin in the body?

Retinol is a co-factor which enables the rhodopsin proteins to detect light in the eye correct incorrect

Nicotinamide adenine dinucleotide is a protein made from vitamin B5, which transfers electrons to coenzyme A during glycolysis correct incorrect

Vitamin A is a precursor of retinal, which binds to a family of proteins known as rhodopsins and is key to human vision. correct incorrect

Vitamin B5 is transformed into coenzyme A, which transfers electrons in processes such as fatty acid synthesis correct incorrect

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Which of the following statements about trace elements is NOT accurate?

Trace elements are metals correct incorrect

Trace elements often enable proteins to function properly correct incorrect

Trace elements include species that are harmful in excessive amounts correct incorrect

Trace elements are absorbed in the form of polyatomic ions correct incorrect

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Glycogen is…

..typically synthesised during exercise correct incorrect

..a biopolymer formed from glucose monomers correct incorrect

..an enzyme which polymerises glucose correct incorrect

..a protein which reverses the polymerisation of glucose correct incorrect

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Which of these sentences does not describe an aspect of glycogen breakdown?

Glycogen breakdown is triggered by glucagon correct incorrect

Glycogen breakdown is triggered by adrenaline correct incorrect

Glycogen breakdown occurs during exercise correct incorrect

Glycogen breakdown is the body's response to high blood sugar levels correct incorrect

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Which of these enzymes is not involved in glycogen breakdown?

glycogen phosphorylase correct incorrect

α-1,6-glucosidase correct incorrect

glucan synthase correct incorrect

hexokinase correct incorrect

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In which conditions would glycogen phosphorylase be most active?

Phosphate group attached, high levels of glucose correct incorrect

Phosphate group not attached, high levels of glucose correct incorrect

Phosphate group attached, low levels of glucose correct incorrect

Phosphate group not attached, low levels of glucose correct incorrect

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The congenital condition alkaptonuria is characterised by a deficiency of:

Tyrosine correct incorrect

Phenylalanine correct incorrect

Homogentisic acid correct incorrect

Homogentisate 1,2-dioxygenase correct incorrect

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Which of the following is not a feedstock for gluconeogenesis?

Glucose correct incorrect

Alanine correct incorrect

Glycerol correct incorrect

Lactate correct incorrect

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Diabetes can lead to coma and even death because:

Insulin signals cells to absorb excess glucose correct incorrect

Acidic ketone bodies raise the pH of blood correct incorrect

The body produces excess glucose correct incorrect

The rate of gluconeogenesis decreases correct incorrect