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HSC Science (General) 12th Standard Board Exam - Maharashtra State Board Important Questions

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What is redifferentiation?

Appears in 1 question paper
Chapter: [7] Plant Growth and Mineral Nutrition
Concept: Differentiation, De-differentiation, Re- Differentiation

Differentiate between cyclic and non-cyclic photophosphorylation.

Appears in 1 question paper
Chapter: [8] Respiration and Circulation
Concept: Mechanism of Respiration > Breathing

Deposition of fatty substances in the lining of arteries results in ____________.

Appears in 1 question paper
Chapter: [8] Respiration and Circulation
Concept: Circulation in Animals

Sketch and label the T.S. of vein.

Appears in 1 question paper
Chapter: [8] Respiration and Circulation
Concept: Blood Vessels

Normal activities of the heart are regulated by ______________.

Appears in 1 question paper
Chapter: [8] Respiration and Circulation
Concept: Human Heart

In the electrocardiogram shown below, which wave represents ventricular diastole?

Appears in 1 question paper
Chapter: [8] Respiration and Circulation
Concept: Circulatory Pathways >> Electrocardiogram (ECG)

Sketch and label the ventral view of the human heart.

Appears in 1 question paper
Chapter: [8] Respiration and Circulation
Concept: Human Heart

What is 'photophosphorylation'?

Appears in 1 question paper
Chapter: [8] Respiration and Circulation
Concept: Mechanism of Respiration > Breathing

Describe non-cyclic photophosphorylation with schematic representation. Give its significance.

Appears in 1 question paper
Chapter: [8] Respiration and Circulation
Concept: Mechanism of Respiration > Breathing

Lowering of blood pressure is related with the production of ____________.

Appears in 1 question paper
Chapter: [8] Respiration and Circulation
Concept: Blood Pressure (B.P.)

Mitochondria are regarded as semiautonomous organelles, due to the presence of ______.

Appears in 1 question paper
Chapter: [8] Respiration and Circulation
Concept: Composition of Blood > Cellular Elements: Red Blood Cells (Erythrocytes)

Name the type of T-lymphocyte which secretes perforins.

Appears in 1 question paper
Chapter: [8] Respiration and Circulation
Concept: Pulmonary and Systemic Circulation (Double Circulation) >> Lymph and Lymphatic System

Distinguish between photosynthesis and aerobic respiration.

Appears in 1 question paper
Chapter: [8] Respiration and Circulation
Concept: Mechanism of Respiration > Breathing

Which of the following are 'scavenger cells'?

(a) Lymphocytes

(b) Erythrocytes

(c) Basophils

(d) Macrophages

Appears in 1 question paper
Chapter: [8] Respiration and Circulation
Concept: Pulmonary and Systemic Circulation (Double Circulation) >> Lymph and Lymphatic System

Give the significance of respiration

Appears in 1 question paper
Chapter: [8] Respiration and Circulation
Concept: Human Respiratory System

Which of the following is mesodermal is the origin?

Appears in 1 question paper
Chapter: [8] Respiration and Circulation
Concept: Human Heart

Name of the valve between the left atrium and left ventricle and give its significance.

Appears in 1 question paper
Chapter: [8] Respiration and Circulation
Concept: Human Heart

Describe agranulocytes with the help of diagrams.

Appears in 1 question paper
Chapter: [8] Respiration and Circulation
Concept: Pulmonary and Systemic Circulation (Double Circulation) >> Lymph and Lymphatic System

What is Sinus arrhythmias?

Appears in 1 question paper
Chapter: [8] Respiration and Circulation
Concept: Human Heart

The help of a well-labelled diagram describes the internal structure of the human heart.

Appears in 1 question paper
Chapter: [8] Respiration and Circulation
Concept: Human Heart
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