IGCSE Biology Paper-2: Specimen Questions with Answers 67 - 69 of 203

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Question 67

Question

MCQ▾

Protein՚s 3-D structure can be determined by-

Choices

Choice (4)

a.

Nuclear magnetic resonance

b.

Spectroscopy

c.

Chromatography

d.

Question does not provide sufficient data or is vague

Answer

a.

Explanation

Nuclear magnetic resonance spectroscopy of proteins also called as protein NMR is a field of structural biology in which NMR spectroscopy is used to obtain data about the structure and dynamics of proteins, and nucleic acids, and their complexes

Question 68

Question

MCQ▾

Which is the example of cardiac muscle-

Choices

Choice (4)

a.

Figure Shows Different Type of Muscles – Choice A

b.

Figure Shows Different Type of Muscles – Choice B

c.

Figure Shows Different Type of Muscles – Choice C

d.

Figure Shows Different Type of Muscles – Choice D

Answer

b.

Explanation

Heart muscle or cardiac muscle is involuntary muscle that is located in wall and histological foundation of heart mainly myocardium. Cardiac muscle is one of three major types of muscle, the others being skeletal and smooth muscle.

Question 69

Question

MCQ▾

What is not a characteristic of respiration process?

Choices

Choice (4)

a.

Uses carbon dioxide to get glucose

b.

Regulating physiological activities

c.

Exhalation of carbon dioxide

d.

inhalation of oxygen

Answer

a.

Explanation

Inhalation of oxygen, exhalation of carbon dioxide, regulating physiological activities are the main features of respiration process but the uses carbon dioxide (CO2) and sunlight to get glucose, water, and oxygen is the process called photosynthesis.

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