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YDT • İngilizce 3. ADIM • 3. DENEME

33. It can be understood from the passage that free
32. - 34. soruları aşağıdaki parçaya göre cevaplayınız. radicals would be manageable by the body ----.

Oxidative stress is a phenomenon developed from an A) as long as antioxidants did not interfere with the
imbalance between oxygen-reactive species (ROS) elimination process
accumulation in cells and tissues and a biological B) unless antioxidants prevented the production of
system’s capacity to detoxify these reactive products. excessive reactive materials
ROS are typically produced as by-products of oxygen
C) with the help of therapeutic medications
metabolism and can play a variety of physiological
specifically used in cancer treatment
roles, such as cell signalling. However, environmental
D) once the metabolism is provided with various
stressors like UV, ionising radiation, pollutants, heavy
antioxidant supplements
metals, and bacteria-suppressing drugs like xenobiotics
greatly increase the production of ROS. Oxidative E) if some environmental factors did not add up to
stress is the result of this very overproduction. In recent the number of the existent ones
years, research on a number of antioxidants, including
vitamin E, flavonoids, and polyphenols, has focused
on their potential or claimed benefits against oxidative
stress. They are considered to prevent oxidation by
either stopping the spread of free radicals (also known
as ROS) or inhibiting their formation through various
methods. Although we typically think of oxidative stress
as being bad for the body, it is also true that it can be used
therapeutically to treat diseases like cancer with some
degree of success. The development of medications with
various anticancer modes of action is made possible by
the raised oxidative stress and strengthened antioxidant
defence mechanisms in cancer cells.

32. According to the passage, oxidative stress occurs 34. It can be inferred from the passage that, contrary
----. to the common belief that oxidative stress is
detrimental, it ----.
A) owing to excessive radiation exposure along with
some other physiological factors A) has slightly contributed to certain advancements
B) if a person does not take sufficient antioxidants in medicine
through his daily diet B) might set a pathway to cancer treatment
C) more frequently in humans, unlike other living C) may reduce the risk of developing cancers
organisms on Earth D) does not pose a serious threat to humans any
D) when the body can no longer eliminate the more
reactive products in cells and tissues E) can be prevented by a boosted immune system
E) because the number of metabolic by-products
exceeds the number of ROS

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