DHS 2022 Grade-4 Lakhimpur Medical College

Photosynthesis produces carbohydrates (initially sugars) from carbon dioxide and water using light energy; oxygen is released.

Vitamin A deficiency may cause night blindness and other eye disorders.

Red blood cells carry most blood oxygen using haemoglobin.

Dengue is transmitted by infected Aedes mosquitoes.

COVID-19 is caused by the coronavirus SARS-CoV-2.

A cataract is clouding of the eye’s lens.

Insulin, secreted by pancreatic beta cells, lowers blood glucose by promoting uptake and storage.

BCG vaccine is used primarily to protect against severe forms of tuberculosis (TB).

Bile contains bile salts that aid fat emulsification but does not contain digestive enzymes.

The human heart has two ventricles: right and left.

As a verb, elongate means to make or become longer; ‘lengthen’ is the closest synonym.

Genuine is an antonym of artificial, meaning real or authentic.

The standard proverb is “Better late than never.”

A vixen is a female fox; the male is a fox.

The simple past of forget is ‘forgot’; ‘forgotten’ is the past participle.

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A group of cows is commonly called a herd.

A person who repairs or makes shoes is a cobbler.

‘Ocean’ begins with a vowel sound, so ‘an’ is grammatically appropriate: “The Pacific is an ocean of the world.”

The irregular comparative and superlative forms are bad → worse → worst.