Skip to content
p.paperbanao.
Continue

Punjab (PTB) · Full book test (board pattern) · Free

2nd Year Biology Full Book Paper

85 marks · 3 hours · 55 questions. Covers: 13 chapters (CHAP 13: THERMOREGULATION AND OSMOREGULATION to CHAP 25: ECOLOGY).

Your school name

2nd Year Biology Full Book Paper

2nd Year · Biology · Punjab (PTB)

Name: ____________Roll No: ________Class/Section: ________Date: ________Total marks: 85Time: 3 hours

Q1. Multiple choice questions (Attempt all · 17 × 1 = 17)

  1. What statistical tool breaks data down into specific intervals for a deeper analysis?

    1. Percentiles

    2. Mean

    3. Mode

    4. Average

  2. In which year did Charles Darwin set sail on his scientific expedition?

    1. 1831

    2. 1809

    3. 1859

    4. 1882

  3. Which of the following is an example of negative feedback?

    1. Blood clotting

    2. Regulation of blood glucose levels

    3. Labor and childbirth

    4. Cytokine storm during infection

  4. If a father has an X-linked dominant trait, who among his children will inherit it?

    1. All of his sons

    2. Half of his sons and half of his daughters

    3. None of his children

    4. All of his daughters

  5. How many initial bases of the new mRNA strand form a temporary hybrid helix with the template DNA strand?

    1. 5 bases

    2. 12 bases

    3. 20 bases

    4. 35 bases

  6. The ureters are tubes that transport urine from the kidneys to the bladder and are approximately how long?

    1. 5 cm

    2. 15 cm

    3. 25 cm

    4. 50 cm

  7. Which parts of a neuron receive information from other cells and carry impulses toward the cell body?

    1. Dendrites

    2. Axons

    3. Axon terminals

    4. Nodes of Ranvier

  8. Macrophages ingest a bacterium by which cellular process?

    1. Exocytosis

    2. Endocytosis

    3. Diffusion

    4. Osmosis

  9. Why has most gene research in humans focused on somatic cells instead of germline cells?

    1. Somatic cells are much larger

    2. Due to risks and ethical issues

    3. Somatic cells do not contain DNA

    4. Germline cells cannot take up foreign genes

  10. The site of the production of sperm is:

    1. Seminiferous tubules

    2. Epididymis

    3. Seminal vesicle

    4. Vas deference

  11. Over-secretion of cortisol from the adrenal cortex results in which disease?

    1. Diabetes insipidus

    2. Cushing disease

    3. Addison's disease

    4. Graves' disease

  12. Type I (convex) survivorship curves are characteristic of which organisms?

    1. Humans and other mammals

    2. Birds and lizards

    3. Fishes and invertebrates

    4. Photosynthetic bacteria

  13. Sulfonamides are often combined with which agent to create a stronger, bactericidal combined therapy?

    1. Quinine

    2. Trimethoprim

    3. Chloroquine

    4. Beta-lactamase

  14. Which of the following is considered the simplest form of variability to measure data dispersion?

    1. Mean

    2. Variance

    3. Range

    4. Percentile

  15. According to the endosymbiotic theory, smaller engulfed prokaryotes capable of aerobic respiration evolved into:

    1. Mitochondria

    2. Nuclei

    3. Chloroplasts

    4. Endoplasmic reticulum

  16. The expansion of blood capillaries lying just beneath the epidermis of the skin to remove excess heat is called:

    1. Vasoconstriction

    2. Vasodilation

    3. Hyperthermia

    4. Hypothermia

  17. Why is the AB blood group called the universal recipient?

    1. It lacks both antigen-A and antigen-B on RBCs

    2. It lacks both anti-A and anti-B antibodies in plasma

    3. It contains all possible antigens and antibodies

    4. It can produce its own blood cells rapidly

Q2. Short questions (Attempt any 8 of 12 · 8 × 2 = 16)

  1. What happens to the body if one cerebral hemisphere suffers damage?

  2. State the role of hormones as chemical messengers.

  3. Briefly explain how Peritoneal Dialysis works.

  4. Trace the path of spermatozoa through the male accessory ducts starting from the seminiferous tubules.

  5. Explain how the body responds via negative feedback when temperature exceeds 37°C.

  6. Differentiate between Beta waves and Delta waves on an EEG.

  7. Differentiate between; Beta and alpha cells of pancreas.

  8. Differentiate between Cortical and Juxtamedullary nephrons.

  9. When do the ova in a females begin meiosis? When do they complete the first meiotic division?

  10. Why can only freshwater animals afford to excrete ammonia directly?

  11. Differentiate between; White matter and grey matter.

  12. Explain how parathormone acts on bones and kidneys to raise blood calcium levels.

Q3. Short questions (Attempt any 8 of 12 · 8 × 2 = 16)

  1. List the three key characteristics of a bar chart.

  2. Define Natural Active Immunity.

  3. How have scientists created malaria-resistant mosquitoes in the laboratory?

  4. What is a replication origin site, and how does its quantity differ between prokaryotes and eukaryotes?

  5. Describe the mutant fly that Thomas Hunt Morgan observed in 1910.

  6. What does a legend in a chart present?

  7. What is the primary drawback of using general immunosuppressive drugs to treat autoimmune diseases or transplant rejection?

  8. Why are bacterial cells preferred as an ideal expression system?

  9. Describe the structural dimensions and nucleotide count of DNA in an average human chromosome

  10. Breakdown the disguised 1:2:1 genetic ratio found within the F2 generation.

  11. How is the median calculated when the number of values in a dataset is even?

  12. How does Active Immunity differ from Passive Immunity?

Q4. Short questions (Attempt any 6 of 9 · 6 × 2 = 12)

  1. Differentiate between the actions of Fluoroquinolones on Gram-positive versus Gram-negative bacteria.

  2. List four major human activities that release excessive carbon dioxide into the atmosphere.

  3. Explain what Divergent Evolution means.

  4. Define the primary purpose of drug discovery and drug development.

  5. Why is the biosphere often called the "Global Ecosystem"?

  6. Why was Lamarck criticized heavily during his own lifetime?

  7. Differentiate between in vitro and in vivo testing in Preclinical Research.

  8. Differentiate between gaseous cycles and sedimentary cycles.

  9. What is the title of the book published by Jean-Baptiste Lamarck, and what does it mean?

Q5. Long questions (Attempt any 3 of 5 · 3 × 8 = 24)

  1. Describe the evidences of evolution that come from comparative anatomy.

  2. Explain the problems related to the rapid growth of human populations and the effects of that growth on ecosystem.

  3. State the role of artificially synthesized steroids in sports and their long-term effects on its users.

  4. Assess the possible consequences of the misuse and overuse of antibiotics on human health.

  5. List some of the behavioural responses of the animals to maintain homeostasis.