Past Paper 2025 12th Class Karachi Board Zoology Objective (Science Pre-Medical Group)

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ZOOLOGY 2025

(Science Pre-Medical Groups)

TIME: 2 Hours

(45 Marks)

SECTION 'A' (Multiple Choice Questions)(9)

NOTE: i) This section consists of 18 part questions and all are to be answered. Each question carries ½ mark.

ii) Do not copy the part questions in your answerbook. Write only the answer in full against the proper number of the question and its part.

1 Choose the correct answer for each from the given options:

i) This belongs to endothermic:

*Frog *Human✓ *Lizard *Fish

ii) Kidney secrete this hormone for maintaining of blood pressure:

*Erythropoietin *Leukopoietin *Renin✓ *Thrombopoietin

iii) A bone lies in between skull and post cranial skeleton is called:

*Malleus *Cervical bone *Hyoid bone✓ *Cranial bone

iv) In vitro fertilization (IVF) is a method used for:

*Treat infertility ✓ *Enhance hormones *Prevents STDs *Enhance Enzymes

v) It is controlled by medulla oblongata in the brain:

*Vision *Memory *Balance *Breathing✓

vi) Goiter is caused by the deficiency of:

*Calcium *Iodine✓ *Potassium *Sodium

vii) Glycogen is converted into glucose by the action of this hormone:

*Insulin *Glucagon✓ *Calcitonin *Cortisol

viii) This is related to abnormal or degenerative changes in vertebrae:

*Sciatica *Spondylosis ✓ *Disc slip *Simple fracture

ix) Part of human brain Hippocampus name from its shape because it resembles with:

*Sea lion *Sea shell ✓ *Sea horse *Horse shoe

x) Syphilis is a sexually transmitted disease caused by:

*Virus *Bacteria✓ *Protozoan *Yeast

xi) The number of muscles in human body is:

*300 *400 *500 *600✓

xii) The end of fertility in female is called:

*Menarch *Menses *Menopause✓ *Ovulation

xiii) It trigger the release of Testosteron into the blood:

*PSH *LH ✓ *PH *Inhibin

xiv) Degeneration of dopamine in neuron caused by this:

*Alzheimer's disease *Parkinson's disease✓ *Huntington's disease *Epilepsy

xv) The hormone that prevents urination and dehydration is:

*Oxytocin *T₃ *ADH ✓ *ACTH

xvi) Over secretion of cortisol causes:

*Addison's disease *Crushing's disease✓ *Acromegaly *Diabetes

xvii) If the body is injured and bleeds, this begin:

*Positive feedback✓ *Negative feedback *Both positive and negative feedback *End of feedback

xviii) This is caused due to the deficiency of insulin:

*High blood pressure *Diabetes✓ *Diarrhea *Anaemia

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