Questions

Q:

Myeloid stem cells give rise to all leukocytes.

A) TRUE B) FALSE
Answer & Explanation Answer: B) FALSE

Explanation:

Hemopoiesis begins in the red bone marrow, with hemopoietic stem cells that differentiate into myeloid and lymphoid lineages.


 


Myeloid stem cells give rise to all the other formed elements, including the erythrocytes; megakaryocytes that produce platelets; and a myeloblast lineage that gives rise to monocytes and three forms of granular leukocytes: neutrophils, eosinophils, and basophils.

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Subject: Biology
Exam Prep: AIEEE , Bank Exams , CAT
Job Role: Analyst , Bank Clerk , Bank PO

4 5477
Q:

What is the oxidation number of carbon in NaHCO3?

A) -4 B) -3
C) +4 D) +2
 
Answer & Explanation Answer: C) +4

Explanation:

The given compound is NaHCO3 Sodium bicarbonate which is commonly known as Baking soda.

Oxidation numbers are the charges on ions. When a neutral atom loses electrons it becomes positively charged. When a neutral atom gains electrons it becomes negatively charged.

 

Here the C represents the oxidation state of carbon in this compound. Compounds are electrically neutral, which is why we set the sum of the oxidation states equal to zero.

Sodium has a +1 oxidation state. Hydrogen has a +1 oxidation state. Oxygen has a -2 oxidation state. There are three oxygen atoms, which means the total oxidation state provided by both oxygen ions is -6. Adding up these oxidation states we get:

1 + 1 + (-6) + C = 0

-4 + C = 0

=> C = 4


This means the oxidation state of carbon in this compound is +4.

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Filed Under: Chemistry
Exam Prep: AIEEE , Bank Exams , GATE
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1 5477
Q:

The central Scientific Instruments Organisation is situated at  

A) Chennai B) Bangalore
C) Chandigarh D) New Delhi
 
Answer & Explanation Answer: C) Chandigarh

Explanation:
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Filed Under: Famous Places

16 5476
Q:

Which one of the following is not a true snake ?

A) Blind snake B) Glass snake
C) Sea snake D) Tree snake
 
Answer & Explanation Answer: B) Glass snake

Explanation:

Glass snake is a lizard.

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Filed Under: Animals and Birds
Exam Prep: Bank Exams , CAT
Job Role: Bank PO

25 5474
Q:

The chosen date for the observance of the Earth Hour 2017 is ?

A) 25th March B) 26th March
C) 27th March D) 28th March
 
Answer & Explanation Answer: A) 25th March

Explanation:

Earth Hour is a people's movement inspiring individuals from more than 7000 cities across the globe to take a stand against climate change, making it the largest voluntary movement ever witnessed in history.

On 25 March 2017, Switch Off and Switch Onto Solar Energy

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Filed Under: Indian Geography
Exam Prep: Bank Exams , CAT
Job Role: Bank Clerk

23 5474
Q:

Which of the following BPO companies is a wholly-owned subsidiary of Polaris software?

A) WNS B) Progeon
C) Optimus D) Spectramind
 
Answer & Explanation Answer: C) Optimus

Explanation:
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Filed Under: Business Awareness

19 5472
Q:

Which type of rock usually underlies a karst landscape?

A) Limestone B) Quartz
C) Granite D) All the above
 
Answer & Explanation Answer: A) Limestone

Explanation:

Karst is a type of landscape that is characterized by caverns, caves, sinkholes, and underground streams. These features were all caused by erosion of the underlying rock.

 

Limestone type of rock usually underlies a karst landscape.

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Filed Under: Indian Geography
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8 5470
Q:

______________ kills the germs present in the water.

 

A) Evaporation B) Rehydration
C) Boiling D) Desiccation
 
Answer & Explanation Answer: C) Boiling

Explanation:
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Filed Under: General Science
Exam Prep: Bank Exams

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