[OBJECTIVE]
Subject: Human Biology
Time Allowed: 10 Minutes
Maximum Marks: 10
NOTE: Attempt this Paper on this Question Sheet only. Please encircle the correct option. Division of marks is given in front of each question. This Paper will be collected back after expiry of time limit mentioned above.
Part-I Encircle the correct option, cutting and overwriting is not allowed. (10)
1. In muscle tissue cells, ________ are very well developed and responsible for contraction and relaxation.
a. Rough Eodoplasmic reticulum b. Smooth Endoplasmic reticulum
c. Actin and Myosin d. Peroxisomes
2. DNA is composed of the following.
a. Amino acids b. Deoxyribonucleotides (A/T/C/G)
c. Wax d. Carbohydrates
3. ________ is NOT found in plants.
a. Irritability b. Adaptation
c. Locomotion d. Growth
4. ________ are the biocatalysts in a living organisms.
a. Polyisoprenoids b. Enzymes
c. Cholesterol d. Sugars
5. Alternative form of a gene that exists in a population is called ________:
a. Deoxyribonucleotide b. Allele
c. Centriole d. Entropy
6. Water is made due to ________ bond between one oxygen and two hydrogen atoms.
a. Tonic bonds b. Covalent Bonds
c. Hydrogen Bonds d. Van der Waal forces
7. Nutrients exchange between blood and cells takes place across ________.
a. Arteries b. Veins
c. Capillaries d. None of the above
8. Human heart is composed of ________ compartments.
a. Three b. Four
c. Five d. Six
9. ________ play role in immunity.
a. Red Blood Cells b. White Blood Cells
d. Platelets d. None of the above
10. The pancreatic duct and the bile duct opens into ________:
a. Jejunum b. Duodenum
c. Ileum d. Colon
[SUBJECTIVE]
Subject: Human Biology
Time Allowed: 2 Hours 45 Minutes
Maximum Marks: 50
NOTE: ATTEMPT THIS (SUBJECTIVE) ON THE SEPARATE ANSWER SHEET PROVIDED.
Part-II Give short details of each of them, each answer carries equal marks. (20)
Q#1: What is respiration? What purpose does it serves? Give its generalized equation.
Q#2: What are the 3 major nutrient molecules? Give three sources of each.
Q#3: What is the pH of the stomach? What enzymes it contains and what are their functions?
Q#4: Why the cortex of the kidneys appears to have reddish dots? And why medulla of the kidneys appears to have stripes/striations?
Part-III Give brief answers, each answer carries equal marks. (30)
Q#1: Describe the 4 major types of tissues found in the human body. Also give their examples and functions.
Q#2: Draw and label the structure of a nephron. Describe how blood is filtered and urine is created different parts of nephron work to filter the blood and make urine.
Q#3: Draw and label the structure of a neuron (nerve cell). Describe in detail how Reflex action occurs.
