Biology Quiz - 1, General Knowledge


25 Questions MCQ Test General Knowledge | Biology Quiz - 1, General Knowledge


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Attempt Biology Quiz - 1, General Knowledge | 25 questions in 50 minutes | Mock test for Current Affairs preparation | Free important questions MCQ to study General Knowledge for Current Affairs Exam | Download free PDF with solutions
QUESTION: 1

Ordinary table salt is sodium chloride. What is baking soda?

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QUESTION: 2

Ozone hole refers to

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QUESTION: 3

Pine, fir, spruce, cedar, larch and cypress are the famous timber-yielding plants of which several also occur widely in the hilly regions of India. All these belong to

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QUESTION: 4

Pollination is best defined as

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QUESTION: 5

Plants receive their nutrients mainly from

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QUESTION: 6

Movement of cell against concentration gradient is called

Solution: Active transport, this is the only transport method that can move species against their concentration gradient (from low to high concentration). Facilitated diffusion only moves species down their concentration gradient from high to low concentration.
QUESTION: 7

Photosynthesis generally takes place in which parts of the plant?

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QUESTION: 8

Most fish do not sink in water because of the presence of

  1. swim bladder
  2. air bladder
  3. air sacs
  4. air in spongy bones
Solution:

option ( a) is correct answer. 

Explanation ;-

Many species of Bony fish have an organ called swim bladder a long chamber of soft flexible walls glasses from inside the fish body can diffuse into this chamber does increasing  the volume this helps in the rising of the fish to  the surface of the water when gas is contained in the chamber are released the walls of  the chamber collapse there by decreasing the volume and hence a decrease in upthrust the fish go deep into the water hence digesting the value of sin letter to the required extend the fish can stay at any level in the water.

QUESTION: 9

Plants synthesis protein from

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QUESTION: 10

Plants absorb dissolved nitrates from soil and convert them into

Solution:

Plants absorb dissolved nitrates from soil and convert them into free nitrogen. Plants also take nitrogen from the soil in the form of ammonium ions. Nitrate exists in the inorganic form in the environment. Plant absorbs nitrates from soil for the formation of protein. The process of Conversion of nitrates into nitrogen by anaerobic bacteria is called denitrification.

QUESTION: 11

Out of 900 reported species of living gymnosperms, conifers are represented by about 500 species, About 2,50,000 species of angiosperms (flowering plants) have also been reported in the world. The vast and dominant woodlands in Europe, Asia, North America and mountains such as Himalayas are wooded with

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QUESTION: 12

One of the following is not a function of bones.

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QUESTION: 13

Plants absorb most part of water needed by them through their

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QUESTION: 14

Photo-oxidation is

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QUESTION: 15

Process of cell division can take place by

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QUESTION: 16

Most highly intelligent mammals are

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QUESTION: 17

Plant development is influenced by

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QUESTION: 18

Prokaryotic cells lack

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QUESTION: 19

Photosynthesis takes place faster in

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QUESTION: 20

Nucleus, the genetic material containing rounded body in each cell, was first discovered in 1831 by

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QUESTION: 21

Primary phloem develops from

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QUESTION: 22

Other than spreading malaria, anopheles mosquitoes are also vectors of

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QUESTION: 23

Plants that grow in saline water are called

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QUESTION: 24

Pyorrhoea is a disease of the

Solution: Pyorrhoea, or periodontal disease, to give it a proper medical term, is a disease of the gums, it is one of the most widely prevalent diseases. It affects the membrane surrounding the roots of the teeth and leads to loosening of the teeth, pus formation, and shrinkage of the gum. This disease is the primary cause for tooth loss among adults.
QUESTION: 25

Mycobacterium leprae causes leprosy, Corynebacterium diphtheria causes diphtheria and Vibrio comma causes

Solution:

Cholera causes due to bacteria Vibrio comma.

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