Biology_2015_STPM term U2_Objectives

Which are true of P and Q?

I. P : Low solute potential in Y ;

Q : High solute potential in Y

II. P : High turgor pressure in X ;

Q : Low turgor pressure in X

III. P : High solute potential in Y ;

Q : Low solute potential in Y

IV : P : Low turgor pressure in X ;

Q : High turgor pressure in X

• I and II

• I and IV

• II and III

• III and IV

The pathways of nerve impulses which occur during and after exercise in the respiratory control centre in humans are given below.

I. Respiratory centre receives nerve impulses from stretch receptors.

II. Respiratory centre sends nerve impulses to diaphragm and intercostal muscles.

III. Respiratory centre receives nerve impulses from chemoreceptor cells.

IV. Respiratory centre sends nerve impulses to diaphragm and intercostal muscles to decrease breathing rate back to normal.

Which is the correct sequence of the pathways?

• I , II , III , IV

• I , III , II , IV

• III , I , II , IV

• III , II , I , IV

Which of the following occurs during ventricular systole?

• Tricuspid valve opens

• Blood is pumped into the aorta

• Lowest pressure of the heart is produced

• Oxygenated blood flows into the right atrium

Which statement is not true of cohesive-tension hypothesis?

• The water potential of air is less negative than that of xylem

• Water loss is the driving force for the movement of water molecules.

• The physical forces of the capillary in xylem cell enable it to overcome gravity.

• Cohesion represents the tendency for water molecules to stick together by hydrogen bonds.

Some hormones and their types are given below.

I. Hormone : Cortisol Type : Steroid

II. Hormone : Androgen Type : Peptide

III. Hormone : Glucagon Type : Peptide

IV. Hormone : Oxytocin Type : Steroid

Which hormones correspond correctly to their types?

• I and II

• I and III

• II and IV

• III and IV

The hormone which is responsible for uniformity in flowering of pineapples is

• auxin

• gibberellin

• cytokinin

• ethylene

Which organs are represented by I, II, III and IV?

• Head : I

  Thymus : II

  Body : III

  Reproduction organ : IV

• Head : II

  Thymus : I

  Body : IV

  Reproduction organ : III

• Head : III

  Thymus : IV

  Body : I

  Reproduction organ : II

• Head : IV

  Thymus : III

  Body : II

  Reproduction organ : I

Which seed components correspond correctly to their respective functions?

• I : p

  II : q

  III : r

• I : p

  II : r

  III : q

• I : q

  II : p

  III : r

• I : q

  II : r

  III : p

What will happen to lactic acid in the body of a person who is resting after a vigorous exercise?

• It will accumulate in his muscle and causes muscle cramp.

• It will undergo gluconeogenesis to form glucose.

• It will converted to pyruvate in the liver.

• It will be broken down by muscle cells.

Which conditions are true about the levels of hormones in the blood of a runner who has run for two hours?

• ADH : Increased

  Aldosterone : Increased

• ADH : Increased

  Aldosterone : Decreased

• ADH : Decreased

  Aldosterone : Increased

• ADH : Decreased

  Aldosterone : Decreased