Diversity in the Living World : Biology

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Q.1.  In-vitro , metabolic reactions means 

 A) reactions occurs in laboratory conditions 

 B) reactions occurs in cell free system 

 C) both (a) and (b) 

 D) none of these

Q.2. The pasted specimens on herbarium are sprayed with 

A) Formaline 

B) 0.1 solution of HgCI

​C) 1% glacial acetic acid 

D)  Alcohol 

Q.3. Which of the following characters is not associated with yeast?

​A) They form pseudo mycelium

B) They possess cleistothecium as fruiting body

C) Birth and bud scar are present on opposite sides of a cell of budding yeast

D) They are saprobic and facultative aerobes

Q.4.  Study the four statements (I-IV) given below and select the two correct ones out of them : (NEET 2016, phase II)     

I. Definition of biological species was given by Ernst Mayr.

II. Photoperiod does not affect reproduction in plants.

III. Binomial nomenclature system was given by RH Whittaker

IV. In unicellular organism reproduction is synonymous with growth.

    The two correct statements are right.

A)  II and III   

B)  III and IV 

C)  I and IV) 

D) I and II

Q.5.  The living organisms can be un-exceptionally distinguished from the non-living things on the basis of their ability for       [CBSE AIPMT 2007]

A) responsiveness to touch

B) interaction with the environment and progressive to evolution

C) reproduction

D) growth and movement

Q.6.  There is no life on moon due to the  absence of      ​[CBSE AIPMT 2002]

A) O 2

B) water

C) light

D) temperature

Q.7. Adaptations shown by birds are

A) shape of beaks

B) type of claws and pneumatic bones

C) modification of fore limbs into wings

D) all of the above

Q.8. Find the odd structure in the life cycle of smile molds with respect to ploidy level

​A) Plasmodium

B) Macro cyst

C) Microcyst 

D) Cyst and Sclerotium

Q.9. Which one of the following is called " fallen stars"?

​A) microcystic

B) Microsites

C) Nostoc

D) Spirulina

Q.10.  Viroid's differ from viruses in having   [NEET 2017]

A) DNA molecules with protein coat

B)DNA molecules without protein coat

C) RNA molecules with protein coat

D) RNA molecules without protein coat

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Vector Algebra: Mathematics MCQ

 

• Answers are in BOLD Option name.
• Click here for HSC Vectors MCQ.
  

Q.1. The vector   lies in the plane of the vectors  and bisect the angle between  . Then which one of the following gives possible values of     (AIEEE 2008) 

A) 

B) 

C) 

D)  

Q2. If 4i+7j+8k, 2i+3j+4k and 2i+5j+7k are the position vectors of the vertices A,B and C respectively of triangle ABC. The position vectors of the point where the bisectors of angle A meets BC is... (Pb. CET 2004)

A) 

B) 

C) 

D)  

Q.3. Direction of a reciprocal vector of a vector  is    ( MP PET 2013)

a) Same as that of 

B) Opposite to 

C) Perpendicular to 

D) None of these

Q.4. If  , then 

A) 6

B) 7

C) 9

D) 10

Explanation-

             

Q.5. If the position vector of three points are  then the three points are 

A) Collinear 

B) Non-coplanar

C) Non-collinear

D) Non of these 

Explanation-

Let P,Q, R be the given points. Then, we have 

                   QR=-2PQ

Hence, P,Q and R are collinear.

Q.6. If the vectors  are collinear then find the value of  

A) 4

B) 6

C) 8

D) 10

Explanation-

 

Q.7. If the origin is the centroid of the triangle whose vertices are A (a, 2, -1) , B (5, b, 2) and C (-3, 1, (C) then find the values of a , b and c .

A) a = 2 , b = 3 , c = 1

B) a = 1 , b = 2 , c = 3

C) a = - 2 , b = - 3 , c = 1

D) a = 2 , b = 3 , c = 1

Explanation-

 

Q.8. If O be the origin and the position vector of A be 4 i +5 j , then a unit vector parallel to  is

A) 

B) 

C) 

D)  

Explanation-

 

Q.9. If  then find  

A) 8

B) 10

C) 14

D) 20

Explanation-

We have, 

 

Q.10. Find the vector of magnitude 3 units which is parallel to  .

A) 2/5 ()

B) 3/5()

C) 7/5()

D) 3/5()

Explanation-