Explanation

Thalassemia is a genetic blood disorder caused by an abnormality in hemoglobin production.

It leads to reduced oxygen-carrying capacity of red blood cells.

Explanation

Lipid-rich components of bacterial cells present in the bacterial membrane.

Bacterial membranes present a large diversity of amphiphilic lipids.

Explanation

Dialysis is a medical treatment used when the kidneys are unable to filter waste products from the blood, typically in renal (kidney) failure.

It helps maintain proper fluid and electrolyte balance in the body.

Explanation

The stratospheric ozone layer is Earth's “sunscreen”  protecting living things from too much ultraviolet radiation from the sun.

Oxygen layer in the atmosphere

Ozone protects us from the harmful ultraviolet radiation of the sun.

Ozone formula: O3

The ozone layer lies approximately 15-40 kilometers (10-25 miles) above the Earth's surface, in the stratosphere.

The ozone layer is depleting: Air pollution

ND17-7-2023

Explanation

Explanation

The age of a tree is determined by counting its growth rings.

They are visible in the cross-section of the stem.

Each ring represents one year of growth.

Explanation

HCl creates an acidic environment (pH 1.5 to 3.5) that activates the enzyme pepsin from its inactive form, pepsinogen.

Pepsin then breaks down proteins into smaller peptides, facilitating digestion.

Explanation

Biology

Life and living organisms, including their structure, function, growth, evolution, and interaction with their environment.

Geology
The Earth, its materials (rocks, minerals), structure, and the processes that shape it (earthquakes, volcanoes, plate tectonics).

Chemistry

Matter, its properties, how it interacts, combines, and changes (chemical reactions, molecular bonds, atomic structure).

Physics:

The fundamental forces and principles of the universe, such as energy, motion, force, and the nature of matter.

Explanation

• A cataract is a clouding of the lens in the eye that affects vision.
• It is a common age-related condition that can cause blurry vision, double vision, and sensitivity to light.
• Cataracts can be treated with surgery to remove the cloudy lens and replace it with an artificial lens.

Explanation

The main constituent of hemoglobin is iron.

Hemoglobin transports oxygen and exhibits a quaternary protein structure.

Iron is crucial for hemoglobin formation; its deficiency can impact hemoglobin production.

Heme in hemoglobin is protoporphyrin IX.

Infants reach adult hemoglobin levels by the end of their first year.

Ferric ions are not part of hemoglobin.

Hemoglobin is found dissolved in plasma.