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 Biology Questions

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Q:

Blood pressure is measured with

A) Thermometer B) Barometer
C) Sphygmomanometer D) Lactometer
 
Answer & Explanation Answer: C) Sphygmomanometer

Explanation:
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Filed Under: Biology

13 4630
Q:

Statement which is true about bacteria ?

A) All bacteria are autotrophs B) Most of them are heterotrophs but some are autotrophs
C) All bacteria heterophs D) All bacteria are photosynthetic
 
Answer & Explanation Answer: B) Most of them are heterotrophs but some are autotrophs

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Filed Under: Biology
Exam Prep: AIEEE

20 4615
Q:

A polygenic trait is controlled by 3 genes A, B and C. In a cross AaBbCc x AaBbCc, the phenotypic ratio of the offsprings was observed as 1 : 6 : m : 20 : m : 6 : 1. What is the value of m?

A) 10 B) 15
C) 18 D) 24
 
Answer & Explanation Answer: B) 15

Explanation:

Here crossing is AaBbCc x AaBbCc

As it is trihybrid cross,

we know, Number of zygotes formed = 4n, where n = 3

43 = 64

Given ratio of offsprings = 1 : 6 : m : 20 : m : 6 : 1

Now,  1 + 6 + m + 20 + m + 6 + 1 = 64

34 + 2m = 64

2m = 30

=> m = 15.

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Filed Under: Biology
Exam Prep: AIEEE , Bank Exams
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2 4599
Q:

Which of the following muscular tissue is multinucleated?

 

A) Smooth muscle B) Cardiac muscle  
C) Skeletal muscle D) Unstriated muscle
 
Answer & Explanation Answer: C) Skeletal muscle

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Filed Under: Biology
Exam Prep: AIEEE , Bank Exams

0 4580
Q:

DNA can be found in what Organelles?

A) Chloroplasts and Mitichondria B) Nucleus and Ribosomes
C) Ribosomes and Mitochondria D) Endoplasmic Reticulum and Nucleus
 
Answer & Explanation Answer: A) Chloroplasts and Mitichondria

Explanation:

DNA can be found in 3 Organelles namely Nucleus, Mitochondria in animals and Chloroplasts in plants.

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Filed Under: Biology
Exam Prep: AIEEE , Bank Exams , CAT , GATE
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15 4578
Q:

Which of the following occurred in the presence of tetrodotoxin?

A) The number of action potentials decreased. B) The size of the action potential increased.
C) The number of action potentials increased. D) The size of the action potential decreased.
 
Answer & Explanation Answer: A) The number of action potentials decreased.

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Filed Under: Biology
Exam Prep: AIEEE

6 4565
Q:

Source of infection in diseases like Tuberculosis, Mumps and Whooping cough is

A) Direct contact B) Droplets of saliva
C) Carrier organism D) A vector
 
Answer & Explanation Answer: B) Droplets of saliva

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Filed Under: Biology

14 4538
Q:

Which one of the following strongly threatens biodiversity?

A) Eragile ecosystems such as mangroves and wetlands B) Inaccessible habitates in the Himalayas
C) Desstruction of natural habitates and regetation and Jhum cultivation D) Creation of biosphere reserves
 
Answer & Explanation Answer: C) Desstruction of natural habitates and regetation and Jhum cultivation

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Filed Under: Biology

13 4519