Todas as questões do ENEM

    At the University of Tokyo, researchers have bioengineered a robotic finger that is covered in human skin, which is water-repellent and self-healing. Using human skin cells, scientists have successfully created a robotic finger that replicates the real look and feel of human skin. This bioengineered skin was found to be water repellent and self-repairing when harmed with minor abrasions and wounds. The skin's ability to repair itself when injured replicates living organisms' skin. In the recently published journal, the scientists explained that the bioengineered skin was created by first using a mixture of collagen and human dermal fibroblasts. The robotic finger is then submerged into the skin solution to give the body part the realistic look of skin. Shoji Takeuchi, a tissue engineer and lead author of this study, expressed his belief that "living skin is the ultimate solution to give robots the look and touch of living creatures since it is exactly the same material that covers animal bodies." Takeuchi and his colleagues believe that their biohybrid invention could help to create realistic-looking robots that work within the medical care and service industry. The humanlike appearance of these robots is an important piece in ensuring that robots appear approachable. Although the first version of the skin is much weaker than our natural skin and is not able to survive without nutrient baths and waste removal, Professor Takeuchi and his team are hopeful about their research. They plan to address their current issues as well as add in more complex features like sensory neurons, hair, nails, and sweat glands.

Disponível em: https://www.discovery.com/. Acesso em: 18 Fev. 2024.

Considering this text on robots and bioengineering, it is INCORRECT to state that

Assinale a alternativa em que a inversão dos termos implica na alteração semântica da expressão.

    In a first, microplastic particles have been linked to heart disease

By Tara Haelle

    Microplastics are everywhere in the environment—and in our bodies. The build-up of these tiny plastic particles in blood vessels is linked to a greater risk of heart attack, stroke, and death, according to a new study. When plaque builds up in arteries—a disease called atherosclerosis—the thicker vessel walls reduce blood flow to parts of the body, raising the risk of strokes, angina, and heart attack. The plaques are typically a mixture of cholesterol, fatty substances, waste from cells, calcium, and a blood clotting protein called fibrin. The new study now focuses on some 300 people with atherosclerosis, some of whom also had tiny plastic particles—microplastics and nanoplastics—embedded in plaques in their carotid artery, a major blood vessel in the neck that provides blood to the brain. The people with plastic-containing plaques were more than four times more likely to have a heart attack or stroke or to die from any cause over the next three years, according to the research published on March 7 in the New England Journal of Medicine.

Disponível em: https://www.nationalgeographic.com/. Acesso em: 11 Abr. 2024.

According to the text, what can be said about microplastic particles? 

Há outros discursos dialógicos mais ou menos explícitos no Texto 1 desta prova. O leitor atento pode identificá-los com certa facilidade. Dentre os exemplos apresentados a seguir, assinale o que NÃO pode ser classificado como dialógico.

Assinale a alternativa que preenche corretamente, na seqüência, as lacunas do período: Os cientistas solicitam a _________________ que _________________ à adoção de medidas que se encontram em __________________ mãos.

Concertgoers wear haptic suits created for the deaf by Music: Not Impossible, during an outdoor concert at Lincoln Center in New York City on July 22, 2023. Angela Weiss—AFP/Getty Images

Feeling the Beats

Music: Not Impossible

By John Mihaly

    The Music: Not Impossible haptic suit—a wearable backpack that weighs a couple pounds, with wrist and ankle attachments—translates audio from a concert venue’s mixers and placed microphones into vibrations that allow people who are deaf to feel the music on their skin. From events at Lincoln Center to South x Southwest, Music: Not Impossible has been lending its not-yet-commercially available suits to deaf and hard-of-hearing visitors. “For the deaf, it’s not just about the music; it’s the social aspect,” says Daniel Belquer, the company’s co-founder and “chief vibrational officer.” “To be involved in something larger than themselves, to disappear among the crowd - hearing people take it for granted.”

Disponível em: http://time.com/. Acesso em: 10 Jan. 2024.

Sobre a tecnologia descrita no texto, é INCORRETO afirmar que ela 

O resto da divisão de (264 + 1) por (232 + 1) é igual a

Assinale a alternativa cuja frase está gramaticalmente correta quanto à concordância nominal.

    Some researchers studying Indigenous actors and filmmakers in the United States have turned their attention to the early days of cinema, particularly the 1910s and 1920s, when people like James Young Deer, Dark Cloud, Edwin Carewe, and Lillian St. Cyr (known professionally as Red Wing) were involved in one way or another with numerous films. In fact, so many films and associated records for this era have been lost that counts of those four figures’ output should be taken as bare minimums rather than totals.

    The chart below represents credited film output of James Young Deer, Dark Cloud, Edwin Carewe, and Lillian St. Cyr. 

Disponível em: http://satsuite.collegeboard.org. Acesso em: 10 Jan. 2024.

    Based on this text and on the data provided in the chart, it is possible to state, for example, that

O conjunto dos números complexos pode ser representado em um plano munido do sistema de coordenadas cartesianas usual. As raízes da equação x4 – 9 = 0, quando representadas no plano, correspondem a pontos que são vértices de um

Considere a equação x2 + px + q = 0, onde p e q são números reais. Se as raízes desta equação são dois números inteiros consecutivos, positivos e primos, então, o valor de (p + q)2 é igual a

Se i é o número complexo cujo quadrado é igual a -1, então, o valor de 5.i227 + i⁶ – i13 é igual a

Read Text 1 and Text 2 below.

Text 1

Most animals can regenerate some parts of their bodies, such as skin. But when a three-banded panther worm is cut into three pieces, each piece grows into a new worm. Researchers are investigating this feat partly to learn more about humans’ comparatively limited abilities to regenerate, and they’re making exciting progress. An especially promising discovery is that both humans and panther worms have a gene for early growth response (EGR) linked to regeneration.

Text 2

When Mansi Srivastava and her team reported that panther worms, like humans, possess a gene for EGR, it caused excitement. However, as the team pointed out, the gene likely functions very differently in humans than it does in panther worms. Srivastava has likened EGR to a switch that activates other genes involved in regeneration in panther worms, but how this switch operates in humans remains unclear.

Disponível em: http://satsuite.collegeboard.org. Acesso em: 10 Jan. 2024.

After you have read both texts, it is possible to state that 

O número de degraus de uma escada é um múltiplo de sete, compreendido entre 40 e 100. Se ao subirmos essa escada, de dois em dois degraus, falta um degrau para atingir o topo da escada e ao subirmos de três em três degraus faltam dois degraus, podemos afirmar corretamente que o número de degraus da escada é

O termo independente de x no desenvolvimento da expressão algébrica (x² – 1)³ .(x² + x + 2)² é

    Historicamente, a medicina ocidental tem obtido grande sucesso na cura de doenças, como apendicite, pneumonia, fraturas e falência de órgãos, com necessidade de transplante. Mas está longe de ser brilhante no tratamento das enfermidades crônicas, aquelas relacionadas ao estilo de vida, incluindo a ansiedade e a depressão. Vivemos uma verdadeira epidemia desses males. O curioso é que as pessoas até têm consciência dos riscos de se alimentar mal, de estar acima do peso, do sedentarismo e, apesar disso, insistem em não modificar seus hábitos. Por que será? Talvez porque os riscos não sejam percebidos no dia a dia como sintomas, pelo menos até que uma dessas doenças do estilo de vida apareça.

PEDRINOLA, Filippo. Um convite à saúde. São Paulo: Editora Abril, 2011, p. 117-118.

No trecho, a expressão negritada “O curioso” é um recurso linguístico por meio do qual se reconhece

Na oração A maior fonte, no entanto, é a queima de combustíveis fósseis, o conectivo oracional indica: