M.C.Q (1 Marks)

MCQ 11 Mark

The source organism of Taq polymerase is:

A
Bacillus thuringiensis
B
Escherichia coli
C
Agrobacterium tumefaciens
D
Thermus aquaticus

Answer

Thermus aquaticus
Explanation: The source organism of Tag polymerase is Thermus aquaticus

MCQ 21 Mark

A chemical substance derived from a living source and has the capacity to inhibit the growth or destroy the microbes is called:

A
Antibiotic
B
Toxoid
C
Toxin
D
Vaccine

Answer

Antibiotic
Explanation: Antibiotic

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MCQ 31 Mark

Study the pedigree chart of a certain family given below and select the correct conclusion which can be drawn for the character

A
The trait under study could not be colour blindness
B
The female parent is heterozygous
C
The male parent is homozygous dominant
D
The parent could not have had a normal daughter for this character

Answer

The female parent is heterozygous
Explanation: Pedigree chart is used to detect the flow of particular trait in the family over several generations. The given charts indicate that the female parent is heterozygous in nature.

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MCQ 41 Mark

The important steps in the process of decomposition are:

A
All of these
B
Humification and mineralization
C
Fragmentation and mineralization
D
Leaching and catabolism

Answer

All of these
Explanation: All of these

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MCQ 51 Mark

The diagram represents the Miller experiment. Choose the correct combination of labelling.

A
A - electrodes, $B - NH _3+ H _2 O , C -$ hot water, D - tap, E - U trap
B
A - electrodes, $B - NH _3+ H _2+ H _2 O +$ $CH _4, C$ - steam, D - Vacuum, E - U trap
C
A - electrodes, $B -\left( NH _3+ H _2+ H _2 O +\right.$ $CH _4$ ), C - cold water, D - Vacuum, E - U Trap.
D
A - electrodes, $B - NH _4+ H _2+ CO _2+$ $CH _3, C -$ hot water, $D -$ Vacuum, $E - U$ Trap.

Answer

A - electrodes, $B -\left( NH _3+ H _2+ H _2 O +\right.$ $CH _4$ ), C - cold water, D - Vacuum, E - U Trap.
Explanation: In Urey and Miller experiment the set up labelled as A-electrodes, $B -\left( NH _3+ H _2+ H _2 O + CH _4\right), C -$ cold water, D-Vacuum, E-U Trap.

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MCQ 61 Mark

Select the option that gives the correct description of the process of Natural Selection with respect to the length of the neck of giraffe.

A
Stabilising selection as giraffes with medium neck lengths are selected.
B
Directional selection as giraffes with longer neck lengths are selected.
C
Stabilising selection as giraffes with longer neck lengths are selected further.
D
Disruptive selection as giraffes with smaller and longer neck lengths are selected.

Answer

Directional selection as giraffes with longer neck lengths are selected.
Explanation: Directional selection as giraffes with longer neck lengths are selected.

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MCQ 71 Mark

Bacteria present in rumen of a cattle digest cellulose to produce

A
Ethanol
B
Sucrose
C
Polysaccharides
D
Methane

Answer

Methane
Explanation: Methane

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MCQ 81 Mark

DNA profiles of the child and three individuals 1, 2 and 3 who claim to be the parents of the child are given below. Select the option that shows the correct actual parent/parents of the child.
.