영어 모의고사 (자동 편성)

Imagine rewriting a bacterium's code the way a programmer ①edits a line of software, and much of what synthetic biology promises begins to make sense. Researchers in this field assemble standardized genetic parts into circuits ②that can be inserted into a cell, instructing it to perform a task that no natural organism would carry out. Because these circuits are built from interchangeable parts rather than designed from scratch each time, a circuit tested in one lab can often ③reusing, with minor adjustments, in an entirely different application. Critics note that biological systems rarely behave as predictably as electronic circuits, since a gene ④inserted into a new cell can interact with existing pathways in unexpected ways, occasionally producing results no engineer intended. Even so, as the catalog of standardized parts keeps expanding, engineers are gaining confidence ⑤to design increasingly complex systems, treating the cell as a chassis onto which new functions can be loaded.

As buildings account for a substantial share of global energy consumption, architects have increasingly turned to a design philosophy ①known as the passive house standard, which minimizes energy demand through the building's own structure rather than through mechanical systems. Central to this approach is airtight construction, in which continuous insulation and sealed joints ②prevents conditioned air from leaking outward, thereby reducing the heating and cooling loads conventional buildings require. Triple-glazed windows, ③oriented to capture sunlight in winter while shading interiors in summer, further stabilize indoor temperatures without relying heavily on furnaces or air conditioners. Ventilation systems ④equipped with heat exchangers also recover warmth from outgoing air, ⑤transferring it to incoming air so that comfort is maintained without excessive energy use. For example, some passive houses built in cold climates have reduced heating costs by more than ninety percent. Consequently, many architects regard passive house design not as a luxury for wealthy homeowners but as a practical model capable of reshaping mainstream construction.

Every time an antibiotic kills off a population of bacteria, a handful of cells carrying a random mutation that resists the drug are left behind to ①multiply without competition. Repeated over decades, across hospitals, farms, and households worldwide, this simple process of natural selection has produced strains of bacteria that survive treatments once considered reliably ②effective. The pharmaceutical industry, meanwhile, has slowed the pace at which new antibiotics reach the market, since a drug meant to be taken for only a week or two rarely earns back the ③enormous cost of developing it. Researchers are therefore searching in ④unconventional places, screening soil microbes, ocean sediment, and even genetic databases for molecules that kill bacteria through mechanisms resistant strains have not yet learned to evade. Some scientists have also revived an older approach, using viruses that infect only bacteria to hunt down resistant strains with a ⑤carelessness no broad-spectrum drug could ever match.

Bacteria have been cutting up invading viral DNA for billions of years, long before any scientist thought to borrow the trick for use in a laboratory. The CRISPR-Cas9 system relies on a short guide RNA that matches a specific DNA sequence, _______________. Once Cas9 arrives at the target site, it slices both strands of the DNA helix, and the cell's own repair machinery rushes in to mend the cut, often introducing a small change in the process. By supplying the cell with a template during this repair step, scientists can direct that machinery to insert a specific new sequence rather than merely disabling the original gene. What once required years of painstaking work to alter a single gene can now be accomplished within days.

A cotton plant that manufactures its own insecticide sounds like science fiction, yet it has been growing in fields around the world for decades. (A) Supporters point to yield increases and reduced pesticide spraying documented across millions of hectares, while critics worry about resistance evolving over time, which is why regulatory agencies in most countries now require extensive testing before a genetically modified crop reaches the market. (B) Other genetically modified crops carry a gene that allows them to survive direct exposure to a particular herbicide, letting farmers spray a field to kill weeds without harming the crop growing among them. (C) Scientists achieved this by isolating a gene from a soil bacterium that produces a protein toxic to specific insect pests but harmless to humans, then inserting that gene into the plant's own genome so that every cell manufactures the protective protein.

A hamburger patty need not come from a slaughtered animal at all if a small sample of muscle cells can be persuaded to multiply inside a steel tank. (A) Inside a bioreactor, the cells multiply across scaffolding designed to encourage them to align into fibers, gradually thickening into something that begins to resemble muscle tissue rather than a shapeless clump of cells. (B) Cultured meat begins with a biopsy of animal muscle tissue, from which scientists isolate cells capable of dividing repeatedly, then feed those cells a nutrient broth that supplies the sugars, proteins, and minerals an animal's bloodstream would normally provide. (C) Supporters argue that because the process never requires raising and slaughtering a whole animal, it could shrink the land, water, and greenhouse gas emissions associated with conventional meat production, though skeptics counter that producing the specialized broth at scale remains prohibitively expensive.

Facing a shortage of caregivers and a rapidly aging population, several countries have begun deploying robots designed to remind elderly residents to take medication and offer simple conversation. (A) Critics, however, worry that this framing quietly shifts the goal of care, so that a robot's companionship comes to be treated as an acceptable substitute for human connection. (B) Early trials show that many residents report reduced loneliness, particularly when a robot's presence allows a human staff member to spend more time with each patient. (C) Advocates for the elderly argue that robots should be evaluated strictly as tools that free up human time for human contact, never as a replacement for it.

Psychologists studying human judgment often describe the mind as operating through two distinct systems rather than a single unified process. (A) This efficiency comes at a cost, however, because System 1's shortcuts can produce systematic errors that an overburdened System 2 rarely catches. (B) Most daily decisions are therefore handled almost entirely by System 1, which allows people to function efficiently without exhausting their limited mental resources. (C) System 1 works quickly and automatically, generating impressions without any noticeable effort, while System 2 is slow and deliberate, engaged only when a problem requires careful reasoning.

None of these individual passersby, however, has any direct evidence that the food itself is worth the wait. Consider how a line forms outside a small restaurant on an otherwise quiet street. ( ① ) The first few patrons may have arrived simply because of a personal recommendation or a delayed reservation, factors entirely unrelated to the restaurant's actual quality. ( ② ) As the line grows, passersby begin to notice it and, assuming that such popularity must be earned, decide to join the queue themselves. ( ③ ) Each additional person who joins makes the line appear even more compelling to the next passerby, creating a self-reinforcing cycle of imitation. ( ④ ) They are, in effect, relying entirely on the visible behavior of strangers as a proxy for information they do not personally possess. ( ⑤ ) The restaurant's true culinary merit, whatever it may be, has become almost irrelevant to the continued growth of the line.

주어진 문장: This durability is especially evident in modern debates about whether people can truly perform two demanding tasks at once. Long before cognitive scientists possessed the tools to observe the brain directly, Donald Broadbent proposed an influential model suggesting that the human capacity to process incoming sensory information is constrained by a structural bottleneck through which only a single stream of input can pass at any given instant. ( ① ) According to this filter theory, multiple channels of stimulation, such as competing voices in a crowded room, are initially registered at a shallow, physical level, but only one channel is selected for further, meaning-based analysis while the rest are blocked from advancing beyond that early filter. ( ② ) Although later researchers challenged the rigidity of this early selection mechanism, pointing to instances in which unattended information, such as one's own name, nevertheless breaks through and captures awareness, ( ③ ) the core insight that attention imposes a genuine processing limit rather than a mere matter of willpower has remained remarkably durable. ( ④ ) This basic bottleneck principle continues to inform contemporary explanations of why multitasking so reliably degrades performance on demanding tasks. ( ⑤ )