All practice questions

Arrange the following sequential steps involved in the industrial biotechnology process of producing ethanol from starchy roots (cassava) in the correct chronological order from first to last.

A firm operating in the short run incurs a total cost of $\text{₦}400$ when output is zero units. At an output level of $8$ units, its average total cost ($ATC$) is $\text{₦}100$. If the marginal cost ($MC$) of producing the $9^{\text{th}}$ unit is $\text{₦}110$ and the marginal cost of producing the $10^{\text{th}}$ unit is $\text{₦}130$, what is the average variable cost ($AVC$) in Naira at an output level of $10$ units?

Oxides and oxygen allotropes exhibit distinct chemical behaviors depending on their bonding and acid-base character. Match each specified oxide or oxygen compound on the left with its corresponding chemical property or classification on the right.

Which of the following policy measures is an example of an expenditure-switching policy used to correct a balance of payments deficit?

Which of the following core characteristics of an oligopolistic market forces each firm to consider the potential reactions of rival firms whenever it alters its price or output strategy?

Under the ordinal utility approach, a consumer optimizes satisfaction subject to a budget constraint when purchasing two commodities, Good $X$ and Good $Y$. Which condition must hold true at this point of consumer equilibrium?

In a free market economic system, which mechanism primarily guides the allocation of scarce resources among competing uses?

Biologists use distinct monitoring techniques and remediation methods to combat different forms of environmental pollution. Match each biological indicator or control intervention on the left with its corresponding ecological monitoring or remediation objective on the right.

A tax authority incurs an administrative cost of $₦350,000$ to collect $₦500,000$ in total revenue from small business owners. Furthermore, the authority requires these business owners to remit their annual tax obligations during their off-season when cash flow is at its lowest point. Which of Adam Smith's canons of taxation are directly violated by this policy?

An economic survey in a local market reveals that when the price of a gallon of vegetable oil increases from $₦8,000$ to $₦10,000$, a household reduces its monthly consumption from $5$ gallons to $4$ gallons, assuming all other factors remain constant (ceteris paribus). Which of the following best describes this economic outcome?

Given the demand function for a commodity as $Q_d = 100 - 5P$ and the supply function as $Q_s = 20 + 3P$, where $P$ represents the price in Naira ($₦$), calculate the equilibrium quantity.

In a local agricultural market, there are $25$ identical cassava producers operating under competitive conditions. The individual supply function for each producer is expressed as $Q_i = -15 + 4P$, where $Q_i$ represents the quantity supplied by a single producer in bags and $P$ is the market price per bag in Naira ($\text{₦}$). If the total aggregate market quantity supplied is $1,325$ bags, what is the prevailing market price per bag in Naira?

A developing country experiences a persistent balance of payments deficit. To limit foreign exchange expenditure on luxury motor vehicles without levying an indirect tax on their importation, the trade ministry fixes a physical maximum of 5,000 vehicles allowed into the country per calendar year. Which commercial policy instrument has the government introduced?

Country X operates under a single, codified constitutional document. However, its provisions state that any clause can be altered through a simple majority vote in the central legislature, following the exact procedure used for passing ordinary statutory laws. Based on constitutional classification criteria, how is the constitution of Country X correctly classified?

During an economic downturn, a country's government attempts to stabilize aggregate demand by increasing public spending on infrastructure financed entirely through issuing government securities to the non-bank public, while the central bank keeps the money supply constant. Which of the following best explains the secondary macroeconomic effect of this fiscal stabilization policy?

In maize plants, the allele for smooth kernels ($S$) is completely dominant over the allele for wrinkled kernels ($s$). According to Mendel's Law of Segregation, a monohybrid cross between two heterozygous smooth-kernel maize plants ($Ss \times Ss$) produces offspring with a genotypic ratio of $3:1$.

An industrial firm in Nigeria requires underwriting services for a new issue of corporate debentures and equipment leasing for factory expansion, while a regional farming association requires long-tenor, concessionary credit tailored to agricultural storage infrastructure. Which pair of financial institutions is structured to directly fulfill the respective financing requirements of the firm and the association?

During peak daylight hours in heavily industrialized urban areas, unburnt hydrocarbons and nitrogen oxides undergo complex atmospheric reactions catalyzed by ultraviolet light. Which of the following substances is produced as a toxic secondary pollutant in this process and serves as a major component of photochemical smog?

Country Y recorded visible exports of $\$600\text{ million}$ and visible imports of $\$850\text{ million}$ during a financial year. Its invisible exports (services rendered abroad) totaled $\$250\text{ million}$, while its invisible imports (services received) stood at $\$100\text{ million}$. What is Country Y's current account balance in millions of dollars? (Note: Express a deficit as a negative value, e.g., -100).

The Land Use Act of 1978 in Nigeria completely eliminated farmland fragmentation for smallholder farmers by vesting outright private land ownership directly in peasant farmers and removing state government authority over agricultural land allocation.