AKU BScN Biology Simulated Past Paper 1

A Full-Syllabus Exam Featuring Recreated Questions from Actual Past Papers

Are you aiming for a career in nursing at the prestigious Aga Khan University School of Nursing and Midwifery? The AKU BScN entrance test demands a strong grasp of biological sciences, particularly human systems and cellular processes. Since authentic AKU BScN Biology past papers are not officially released, we have created this AKU Biology Simulated Past Paper 1 to provide you with a realistic testing experience. This simulator focuses on the core conceptual scope seen in nursing entrance exams, including circulatory sequences, hormonal regulation, and basic genetics. Test your knowledge below and gain the confidence needed to excel in your nursing career journey.
Check out our AKU BScN Physics Simulated Past Papers for more BScN prep.

Important Disclaimer:

Aga Khan University (AKU) does not officially release its past entrance exam papers. The questions in this assessment are memory-based, reconstructed models that have been pedagogically improved for clarity. They are designed to closely simulate the difficulty, pattern, and conceptual scope of the actual exam. Please note that these are strictly unofficial practice questions intended exclusively to aid your preparation.

1. The common potato (Solanum tuberosum) is a modified plant organ. From which structure does the edible tuber arise?

Quick-Fact & Solution

Correct: C

Explanation: A potato is a modified stem, evidenced by the presence of “eyes” which are actually nodes/axillary buds. This distinguishes it from sweet potatoes, which are modified roots.

2. When a student is performing complex mathematical reasoning and logical deductions, which division of the brain is the primary center for these higher-order executive functions?

Quick-Fact & Solution

Correct: B

Explanation: The telencephalon (cerebral hemispheres) is responsible for conscious thought, intelligence, memory, and reasoning.

3. In angiosperms, the edible part of a true fruit typically develops from the ovary wall. Which of the following is the specific term for the fleshy middle layer of a drupe fruit like a mango?

Quick-Fact & Solution

Correct: B

Explanation: The pericarp is divided into the epicarp (skin), mesocarp (flesh), and endocarp (pit/stone). In mangoes, we eat the mesocarp.

4. Hemophilia is an X-linked recessive disorder. A couple has three children: a hemophilic son, a normal son, and a hemophilic daughter. What are the parental genotypes?

Quick-Fact & Solution

Correct: B

Explanation: For a daughter to be hemophilic ($X^h X^h$), she must inherit one $X^h$ from her father (making him $X^h Y$) and one from her mother (making her at least $X^H X^h$). The presence of a normal son ($X^H Y$) confirms the mother has a dominant $X^H$ to give.

5. Which of the following represents the correct anatomical sequence of deoxygenated blood returning from the systemic tissues to the site of oxygenation?

Quick-Fact & Solution

Correct: B

Explanation: Deoxygenated blood is carried by systemic veins to the vena cava, into the right side of the heart, and then pumped to the lungs via the pulmonary artery.

6. If a mature protein consists of a sequence of 200 amino acids, what is the minimum number of nucleotides required in the mRNA coding region (excluding the stop codon)?

Quick-Fact & Solution

Correct: C

Explanation: Genetic code is a triplet code ($1 text{ amino acid} = 3 text{ nucleotides}$). Thus, $200 times 3 = 600$ nucleotides.

7. Which statement accurately describes a fundamental difference between Meiosis-I and Mitosis?

Quick-Fact & Solution

Correct: A

Explanation: Synapsis (pairing of homologous chromosomes) and crossing over are unique features of Prophase-I of meiosis, ensuring genetic variation.

8. A localized physiological response characterized by the accumulation of Plasma and White Blood Cells (WBCs), resulting in heat, pain, and swelling, is known as:

Quick-Fact & Solution

Correct: B

Explanation: Inflammation is a non-specific second line of defense aimed at isolating and destroying pathogens.

9. Which of the following conditions is not caused by a mutation affecting a specific protein or amino acid sequence?

Quick-Fact & Solution

Correct: D

Explanation: Osteomalacia is a nutritional/environmental disorder, whereas the others are hereditary molecular diseases caused by genetic mutations.

10. The “sensitive plant” (Mimosa pudica) exhibits rapid leaf drooping upon physical contact. This non-directional movement in response to touch is termed:

Quick-Fact & Solution

Correct: B

Explanation: Nastic movements are non-directional responses. Haptonasty (or thigmonasty) specifically refers to responses to mechanical touch.

11. Parthenocarpy, or the formation of seedless fruits without fertilization, can be induced artificially. The application of which hormone is most commonly associated with this process?

Quick-Fact & Solution

Correct: C

Explanation: Auxins (and sometimes gibberellins) are used to induce the development of the ovary into a fruit without pollination or fertilization.

12. According to Darwin’s Theory of Natural Selection, which sequence represents the most logical flow of biological events?

Quick-Fact & Solution

Correct: A

Explanation: Natural selection starts with overpopulation leading to competition (struggle), where pre-existing variations determine survival and subsequent inheritance.

13. During embryonic development, which germ layer is primarily responsible for the formation of the circulatory system, muscles, and most internal organs?

Quick-Fact & Solution

Correct: B

Explanation: Mesoderm gives rise to skeletal, muscular, and circulatory systems. Ectoderm forms nervous system/skin, and endoderm forms gut lining.

14. In the context of reproductive cloning, which of the following is not necessarily true about the clone relative to the donor?

Quick-Fact & Solution

Correct: D

Explanation: A clone is a genetic copy, but environmental factors (epigenetics, upbringing, habitat) ensure they are distinct individuals.

15. An apple is classified as a “false fruit” because the succulent part we consume originates from a structure other than the ovary. Identify this structure:

Quick-Fact & Solution

Correct: B

Explanation: In an apple, the ovary forms the “core,” while the edible part is the swollen thalamus/receptacle.

16. A mother has blood type AB ($I^A I^B$) and the father has blood type O ($ii$). What are the possible phenotypes for their biological offspring?

Quick-Fact & Solution

Correct: C

Explanation: The mother provides either an $I^A$ or $I^B$ allele. The father provides only $i$. The resulting genotypes are $I^A i$ (Type A) and $I^B i$ (Type B).

17. Most sensory messages traveling toward the cerebral cortex are first received and “sorted” by a specific relay station in the brain. Identify this structure:

Quick-Fact & Solution

Correct: B

Explanation: The thalamus acts as a major relay and processing center for information from all senses (except smell) destined for the higher centers of the brain.

18. Biological organisms are categorized based on their cellular complexity. This includes the distinction between:

Quick-Fact & Solution

Correct: A

Explanation: Cellular complexity refers to the structural organization (nucleus/organelles presence). Option B refers to number of cells, and Option C refers to nutrition.

19. The primary metabolic distinction between aerobic and anaerobic respiration in eukaryotes is the:

Quick-Fact & Solution

Correct: B

Explanation: Aerobic respiration yields significantly more ATP ($approx 36$-$38$) compared to the net gain of only 2 ATP in anaerobic respiration.

20. If a cell completes Telophase-I with chromosomes consisting of two sister chromatids, what will be the state of the chromosomes after the completion of Telophase-II?

Quick-Fact & Solution

Correct: B

Explanation: Meiosis-II is an equational division where sister chromatids separate. Thus, each final daughter cell has single-stranded chromosomes.

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