Question 1

The middle vascular coat that darkens the eye chamber and prevents refraction by absorbing the light rays is&#10;A)choroid&#10;B)sclera&#10;C)retina&#10;D)cornea

Accepted Answer

The choroid is the correct answer because it is the part of the eye's vascular layer that contains a pigment to absorb excess light, preventing internal reflection that would blur vision.

Question 2

The eye lens is a&#10;A)transparent double-convex lens&#10;B)transparent double-concave lens&#10;C)transparent concavo-convex lens&#10;D)none of these

Accepted Answer

The eye lens is a transparent double-convex lens, which means it is curved outward on both sides. This shape helps in converging light rays to focus images on the retina.

Question 3

The eye lens contains a watery liquid called the&#10;A)aqueous humour&#10;B)peroxide&#10;C)vitreous humour&#10;D)none of these

Accepted Answer

The eye lens contains a watery liquid called the aqueous humour, which is located in the anterior chamber of the eye, between the cornea and the lens.

Question 4

Long-sightedness is caused by the eyeball being too short. It can be corrected by the use of a&#10;A)convergent lens&#10;B)plane mirror&#10;C)divergent lens&#10;D)none of these

Accepted Answer

Long-sightedness (hyperopia) is corrected with a convergent lens, which helps focus light more directly onto the retina by compensating for the shorter eyeball.

Question 5

A lens which is thicker in the middles and thinner at the edges is called a _____ lens.&#10;A)convex&#10;B)concave&#10;C)cylindrical&#10;D)none of these

Accepted Answer

A lens that is thicker in the middle and thinner at the edges is known as a convex lens. This shape allows the lens to converge light rays to a focal point.

Question 6

A lens which is thinner at the middles and thicker at the edges is called a _____ lens.&#10;A)convex&#10;B)concave&#10;C)cylindrical&#10;D)none of these

Accepted Answer

A lens that is thinner in the middle and thicker at the edges is a concave lens, which diverges light rays passing through it.

Question 7

Which of the following lens is used to minimise hypermetropia?&#10;A)convex lens&#10;B)concave lens&#10;C)cylindrical lens&#10;D)none of these

Accepted Answer

Convex lenses are used to correct hypermetropia (farsightedness) because they help focus light more directly onto the retina, compensating for the eye's inability to focus light on its own.

Question 8

Most of the refraction of light takes place in the&#10;A)iris&#10;B)cornea&#10;C)pupil&#10;D)retina

Accepted Answer

The cornea is the eye's outermost layer and is the primary structure responsible for focusing light that enters the eye, thus playing a crucial role in the refraction process.

Question 9

When the light is very bright,&#10;A)the iris makes the pupil expand&#10;B)the iris makes the pupil contract&#10;C)the iris and the pupil remain as they are&#10;D)none of these

Accepted Answer

The iris adjusts the size of the pupil in response to the brightness of light. In bright light, the iris makes the pupil contract to reduce the amount of light entering the eye, helping to protect the retina and improve the sharpness of the image.

Question 10

Who discovered by his experiments with glass prisms that white light consists of seven colours?&#10;A)Newton&#10;B)Faraday&#10;C)Maxwell&#10;D)Young

Accepted Answer

Isaac Newton discovered that white light is composed of seven colors by experimenting with glass prisms. He demonstrated that when white light passes through a prism, it separates into a spectrum of colors, and when these colors are combined again, they form white light.

Question 11

The light which refracts most while passing through a prism is&#10;A)red&#10;B)violet&#10;C)indigo&#10;D)yellow

Accepted Answer

The answer of The light which refracts most while passing...

Question 12

The planet having the largest number of satellites amongst the following is&#10;A)Jupiter&#10;B)Saturn&#10;C)Uranus&#10;D)Mars

Accepted Answer

The answer of The planet having the largest number of...

Question 13

In the absence of his tone proteins in prokaryotes, the an ioinic charges of each inter nucleotide phosphate in DNA is neutralized by&#10;A)phospholipids&#10;B)polyamines&#10;C)polysaccharides&#10;D)glycelipids

Accepted Answer

The answer of In the absence of his tone proteins...

Question 14

Phagocytosis and pinocytosis are collectively termed as&#10;A)endocytosis&#10;B)suspension feeding&#10;C)omnivores&#10;D)mucous trap

Accepted Answer

The answer of Phagocytosis and pinocytosis are collectively termed as&#10;A)endocytosis&#10;B)suspension...

Question 15

Which one of the following is called pacemaker of the heart?&#10;A)SA node&#10;B)AV node&#10;C)Chordae tendinae&#10;D)AV septum

Accepted Answer

The answer of Which one of the following is called...

Question 16

The life span of human WBCs is normally&#10;A)12-13 days&#10;B)80-90 days&#10;C)100-120 days&#10;D)20-30 days

Accepted Answer

The answer of The life span of human WBCs is...

Question 17

Oxygenated bold is carried by&#10;A)pulmonary vein&#10;B)pulmonary artery&#10;C)hepatic portal vein&#10;D)renal vein

Accepted Answer

The answer of Oxygenated bold is carried by&#10;A)pulmonary vein&#10;B)pulmonary artery&#10;C)hepatic...

Question 18

The reserve food in fungal cell is&#10;A)glucose&#10;B)fructose&#10;C)glycogen&#10;D)starch

Accepted Answer

The answer of The reserve food in fungal cell is&#10;A)glucose&#10;B)fructose&#10;C)glycogen&#10;D)starch...

Question 19

Trypanosoma is&#10;A)bacteria&#10;B)fungus&#10;C)algae&#10;D)protozoa

Accepted Answer

The answer of Trypanosoma is&#10;A)bacteria&#10;B)fungus&#10;C)algae&#10;D)protozoa...

Question 20

Seeds are called the products of sexual reproduction due to&#10;A)it gives rise to new plants&#10;B)formation by fusion of pollen tubes&#10;C)it can survive for longer periods&#10;D)are formed by fusion of gametes

Accepted Answer

The answer of Seeds are called the products of sexual...

Question 21

The most essential organ for fertilization is&#10;A)juicy fruit&#10;B)green sepals&#10;C)coloured petals&#10;D)mature ovule

Accepted Answer

The answer of The most essential organ for fertilization is&#10;A)juicy...

Question 22

BCG vaccine is used to protect a child from&#10;A)polio&#10;B)plague&#10;C)dengue&#10;D)tuberculosis

Accepted Answer

The answer of BCG vaccine is used to protect a...

Question 23

Bulliform cells are present in&#10;A)lower epidermis of monocot leaves&#10;B)upper epidermis of monocot leaves&#10;C)dicot stem&#10;D)upper epidermis of dicot leaves

Accepted Answer

The answer of Bulliform cells are present in&#10;A)lower epidermis of...

Deck 10: The Anatomy and Physiology of the Eye, Light Refraction, and Cellular Processes in Biology