Tag: biology

Quizzes (1160) Questions (12174)

Questions Related to biology

Multiple choice biology movement and locomotion in living organisms movements in plants coordination in plants tropic and nastic movements in plants

Choose the correct answer from the alternatives given.
Which of the following lights is the most effective in phototropism?

  1. Red

  2. Far-red

  3. Blue`

  4. Green
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Phototropism in plants is primarily mediated by phototropins, which are blue-light receptors. Blue light is significantly more effective at inducing phototropic curvature than red or green light.

Multiple choice biology life processes in living organism movements in plants coordination in plants tropic and nastic movements in plants

Centromere is a part of chromosome which helps in the 

  1. Division of centrosomes

  2. Formation of spindle fibres

  3. Movement of chromosomes

  4. Formation of nuclear spindle
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Centromere joins the microtubules of 'Chromosomal spindle fibres and helps in the movement of chromosome during cell division. Centromere also plays an important role in the polymerization of tubulin protein used in the formation of microtubules. Hence it is helpful in attaching the chromosome with spindle fibres.

Multiple choice biology life processes in living organism movements in plants coordination in plants tropic and nastic movements in plants

Locomotion is a very important feature in animals.Considering the frequent need for locomotion in animals ,an animals would obtain the greatest benefit from storing its energy as 

  1. Proteins

  2. minerals

  3. Carbohydrates

  4. Fats
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Fats store more than twice the amount of energy per unit mass compared to carbohydrates and proteins, making them the most lightweight and efficient form of long-term energy storage for mobile animals. Storing energy as glycogen or protein would add excessive weight.

Multiple choice biology life processes in living organism movements in plants coordination in plants tropic and nastic movements in plants

Which foramen is paired in mammalian brain ?

  1. Foramen of Monro

  2. Foramen of Magendie

  3. Interventricular foramen

  4. Foramen of Luschka
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The Foramen of Luschka (lateral apertures) is a paired structure in the brain that allows cerebrospinal fluid to exit the fourth ventricle. The other listed foramina are singular structures.

Multiple choice biology life processes in living organism movements in plants coordination in plants tropic and nastic movements in plants

Which cranial nerve is present in Rabbit but absent in frog?

  1. Glossopharyngeal

  2. Hypoglossal

  3. Olfactory

  4. Optic
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The hypoglossal nerve (XII) is a cranial nerve present in mammals, including rabbits, but it is absent in amphibians like frogs. In frogs, the tongue muscles are innervated by spinal nerves rather than a dedicated cranial nerve.

Multiple choice biology structure and functions of living organisms -ii role of receptors in the mouth types of teeth circulatory system and organs

Consider the following statements each with two blanks.
(A) Seminiferous tubules produce (i) while Leydig's cells produce (ii).
(B) In females, urethra is small and conducts (iii) while in males it conducts urine and (iv).
(C) The process Of formation of spermatozoa from spermatogonia is called (v) and the process of maturation of spermatids into spermatozoa is called (vi).
Which one of the following options, gives the correct fill ups for the respective blank numbers from (i) to (vi) in the statements?

  1. (i)-spermatozoa, (ii)-testosterone,

    (v)-spermatogenesis, (vi)-spermiogenesis

  2. (i)-testosterone, (ii)-spermatozoa, (iii)-urine, (iv)-semen

  3. (i)-estrogen, (ii)-testosterone, (v)-spermiogenesis, (vi)-spermatogenesis

  4. (iii)-urine, (iv)-semen, (v)-spermiogenesis, (vi)-spermatogenesis
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The seminiferous tubules are the location of the production of spermatozoa or sperms in the testicular lobule. The Leydig cells (interstitial cells) outside the seminiferous tubule synthesize and secrete testicular hormones called androgens or testosterone. Spermatogenesis is the process of immature male germ cells (spermatogonia) develop into mature sperms or spermatozoa. After this process, the conversion of the four equal haploid spermatids into spermatozoa (sperms) is called spermiogenesis. 

So, the correct option is '(i)-spermatozoa, (ii)-testosterone, (v)-spermatogenesis, (vi)-spermiogenesis'.

Multiple choice biology structure and functions of living organisms -ii role of receptors in the mouth types of teeth circulatory system and organs

In frogs, body proportions do not change with their growth. A frog  that is twice as long as another will be  heavier by approximately ?

  1. Two-fold

  2. Six-fold

  3. Four-fold

  4. Eight-fold
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

In frogs, body proportions do not change with their growth. This means that the weight and height of a frog increase and decrease proportionately. If one of these parameters increase, so does the other, and by the same proportion, and vice-versa. Hence, if a frog is twice as long as another, it will be approximately two times heavier also.

So, the correct answer is 'Two-fold'.

Multiple choice biology structure and functions of living organisms -ii role of receptors in the mouth types of teeth circulatory system and organs

The graph of electrical activity of heart versus time produced by non-invasive medical procedure is called 

  1. Electro - cardiograph

  2. Electro - encephalograph

  3. Electro - cardiogram

  4. Electro - cardiography
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The graph of electrical activity of heart versus time produced by non-invasive medical procedure is called electrocardiograph. The process of recording the electrical activity of heart over a period of time is called as electrocardiography (ECG). The graph of electrical activity of brain versus time is called as electroencephalograph. The machine used to record the electrical activity of heart is called as electrocardiogram.

Thus, the correct answer is 'Electro - cardiograph.'

Multiple choice biology structure and functions of living organisms -ii role of receptors in the mouth types of teeth circulatory system and organs

Match column I with column II and select the correct option from the codes given.

Column I Column II
A. Testis (i) Pigmentation
B. Ovaries (ii) Atrophies in adult
C. Thymus (iii) Estrogen
D. Melanin (iv) Testosterone

  1. A-(iii), B-(iv), C-(i), D-(ii)

  2. A-(ii), B-(iii), C-(iv), D-(i)

  3. A-(iv), B-(iii), C-(ii), D-(i)

  4. A-(i), B-(iv), C-(ii), D-(iii)
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation
Testosterone is released from testis.
Estrogen is released by ovaries.
In the case of the thymus, the atrophy in an adult is observed.
Melanin is the reason for pigmentation.
So, the correct option is 'A-(iv), B-(iii), C-(ii), D-(I)'