Biology Mock Test | General Science | BPSC

Q1. In the context of systems biology, a metabolic network is often represented as a directed graph. If the nodes represent metabolites and the edges represent enzymatic reactions, what type of graph theoretical problem would be most relevant for predicting the flux distribution under varying substrate concentrations and enzyme kinetics?

Maximum flow problem Traveling salesman problem Shortest path problem Graph coloring problem

Q2. The 'arousal' state in an animal's behavioral motivation is most closely associated with:

Motivation-action sequences Innate releasing mechanisms Sign stimuli Fixed action patterns

Q3. What is the protein coat of a virus called?

Capsid Nucleoid Cell membrane Ribosome

Q4. A virus that remains dormant within a host cell for a period before causing disease is said to be:

Virulent Temperate Latent Oncogenic

Q5. Which of the following is a characteristic of a biodiversity hotspot?

Low endemism and high human impact High endemism and low human impact Low endemism and low human impact High endemism and high human impact

Q6. Biotechnology can be used for environmental remediation, which means:

Building new cities Cleaning up pollution Designing buildings Studying weather patterns

Q7. Which of the following is an example of a sensory neuron?

Motor neuron Interneuron Neuron that transmits information from the skin to the brain Neuron that transmits commands to muscles

Q8. Viruses are considered to be:

Living organisms Non-living entities Prokaryotic cells Eukaryotic cells

Q9. Systems biology often involves modeling complex feedback loops. In a negative feedback loop, if a product inhibits its own production, what is the typical effect on the system's stability and response to perturbations?

Increased sensitivity and potential for oscillations. Decreased sensitivity and increased stability. Amplification of the initial signal. Decoupling of the components.

Q10. When a parasitic wasp lays its eggs inside a caterpillar, this is an example of:

Predation Parasitism Mutualism Commensalism

Q11. The accumulation of small genetic changes over long periods can lead to:

Genetic drift Speciation Gene pool stabilization Artificial selection

Q12. The largest taxonomic rank below Domain is:

Kingdom Phylum Class Order

Q13. The ethical challenge of 'resource allocation' in healthcare systems often involves difficult decisions about how to distribute limited medical resources, such as organs for transplantation, ICU beds, or expensive treatments. This debate most directly engages which ethical principle?

Autonomy Non-maleficence Justice Confidentiality

Q14. The 'pacemaker' of the heart, responsible for initiating the electrical impulse that drives contraction, is the:

Atrioventricular (AV) node Sinoatrial (SA) node Bundle of His Purkinje fibers

Q15. Which type of bacterial pili are primarily involved in the transfer of genetic material between bacterial cells during conjugation?

Type IV pili Fimbriae Sex pili (or F pili) Attachment pili

Q16. During interphase, DNA replication occurs in the nucleus. Which enzyme is primarily responsible for unwinding the DNA double helix ahead of the replication fork?

DNA ligase Topoisomerase Primase Helicase

Q17. Which type of cell lacks a membrane-bound nucleus and other membrane-bound organelles?

Eukaryotic cell Prokaryotic cell Animal cell Plant cell

Q18. The dynamic instability observed in microtubules, characterized by rapid polymerization and depolymerization, is primarily regulated by which of the following factors?

GTP hydrolysis and the presence of capping proteins Calcium concentration and calmodulin binding MAPs (Microtubule-Associated Proteins) and their phosphorylation state The concentration of free tubulin dimers and the rate of GTP binding

Q19. Which of the following terms describes a drug that binds to a receptor and elicits a biological response, but with lower intrinsic activity than a full agonist?

Antagonist Inverse agonist Partial agonist Agonist

Q20. Which of the following is a characteristic feature of archaea that distinguishes them from bacteria?

Presence of peptidoglycan in the cell wall Membrane lipids with ester linkages Circular chromosome and absence of a nucleus Membrane lipids with ether linkages

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