Match the following Columns
Column I (Pollination Technique) | Column II (Pollinator) |
A. Cheiropterophily | 1. Ant |
B. Anemophily | 2. Bat |
C. Myrmecophily | 3. Snail |
D. Malaciphily | 4. Wind |
A – 3; B – 2; C – 1; D – 4
A – 2; B – 4; C – 1; D – 3
A – 4; B – 3; C – 2; D – 1
A – 1; B – 3; C – 2; D – 4
B.
A – 2; B – 4; C – 1; D – 3
Pollination Techniques | Pollinator |
Chiropterophily | Bat |
Anemophily | wind |
Myrmecophily | Ant |
Malacophily | Snail |
Which one of the following microbes is the source for vitamin-C?
Pseudomonas sp.
Acetobacter sp.
Aspergillus sp.
Chlorella
B.
Acetobacter sp.
Acetobacter sp. is a source of Vitamin-C.
Which one of the following options is not a sexually transmitted disease?
AIDS
Hepatitis-B
Pertussis
Syphilis
C.
Pertussis
Pertussis (a whooping cough) is not a Sexually Transmitted Disease (STD), while other diseases are transmitted by sexual relationships.
Diphtheria is caused by
Poison released by living bacterial cell into the host
Poison released from the dead bacterial cell into the host
Poison released by the virus into the host
Excessive immune response by the body of the host
A.
Poison released by living bacterial cell into the host
Diphtheria is caused by poison released by living bacterial cell of Corynebacterium diphtheriae into the host body
Pappus helps in the dispersal of pollen in
Asteraceae
Brassicaceae
Malvaceae
Solanaceae
A.
Asteraceae
Pappus are modified bracts of Asteraceae family.These hairy structures help in dispersal of pollen by
wind.
The fact that DNA is a genetic material was established by the experiment of
Meselson and Stahl
Hershey and Chase
Avery, Macleod and McCarty
Rosalind Franklin and Kornberg
B.
Hershey and Chase
The experiment of Hershey and Chase by bacteriophage first time proved that DNA is a genetic material.
In case of pregnancy, the heartbeat of embryo starts at
4th week
7th week
6th week
5th week
D.
5th week
On the 5th week of pregnancy a large tube (premitive heart) starts to beat and pump blood in embryo.
The term ‘prebiotic’ soup’ for organic water containing mixture of simple organic compounds was given by
Richter
Haldane
Arrhenius
Miller
B.
Haldane
The term 'prebiotic soup' is used by Haldane for organic water containing a mixture of simple organic compounds during the early stage of origin of life.
Number of Barr body which will found in case of Turner’s syndrome will be
1
2
0
Can't be determined by given data
C.
0
The number of barr body in human = one less than the number of x Chromosome. In case of Turner syndrome 45(44+ X) chromosomes are found. So number of Barr bodies will be-zero.
Consider these sentences regarding to the structure and nature of DNA.
(I) DNA has tow pyrimidine bases which contain single ring structure.
(II) In DNA, the composition of bases should be
(III) Each base pair of DNA is 3.4Å apart from the base pair.
(IV) The nucleosome model DNA packaging was proposed by Kornberg and Thomas.
I and III
I, II and III
II, III and IV
I, III and IV
D.
I, III and IV
Erwin Chargaff (1950) made quantitative analysis of DNA and showed that the composition of DNA molecules varies in complex ways depending upon the source of DNA. He proposed Base Equivalence rule or Chargaff's rule, which states that for double-stranded DNA, the proportion of adenine always equals to that of thymine and proportion of guanine always equals to that of cytosine.
i.e. A=T and G=C.
It follows that, an equal proportion of purines and pyrimidines is always seen in a double-stranded DNA
i.e.