M.C.Q (1 Marks)

MCQ 11 Mark

Which of the given statements is correct in the context of visualizing DNA molecules separated by agarose gel electrophoresis?

A
DNA can be seen in visible light.
B
Ethidium bromide-stained DNA can be seen under exposure to UV light.
C
Ethidium bromide-stained DNA can be seen in visible light.
D
DNA can be seen without staining in visible light.

Answer

(b) : Ethidium bromide-stained DNA can be seen under exposure to UV light.
Explanation: The separated DNA fragments by gel electrophoresis can be visualized only after staining the DNA with a compound known as ethidium bromide followed by exposure to UV radiation (you cannot see pure DNA fragments in the visible light and without staining).

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MCQ 21 Mark

Single cell protein refers to:

A
A specific protein extracted from a single cell.
B
Proteins extracted from a single cell.
C
Sources of mixed proteins extracted from pure or mixed culture of cells.
D
A specific protein extracted from pure culture of single type of cells.

Answer

(d) : A specific protein extracted from pure culture of single type of cells.
Explanation: A specific protein extracted from pure culture of single type of cells.

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MCQ 31 Mark

What does the chart give below represent?

A
XX - XO type of sex determination
B
XX - XY type of sex determination
C
XO - XX type of sex determination
D
xy - xx type of sex determination

Answer

(a) : XX - XO type of sex determination
Explanation: The chart given below represents XX-XO type of sex determination in which XX forms the female and XO develops as a male. It is common in birds.

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MCQ 41 Mark

Sequence of species through which the organic molecules in a community process is:

A
Ecological pyramid
B
Population
C
Food chain
D
Ecosystem

Answer

(c) : Food chain
Explanation: Food chain

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MCQ 51 Mark

What was the mixture of gases used in chamber marked $A$ ?

A
Oxygen $O_2,$ ammonia $(NH_3),$ hydrogen $H_2,$ and water $H_2O$
✓
Methane $(CH_4) v,$ ammonia $(NH_3),$ hydrogen $H_2$ and water $H_2O$
C
Oxygen $O_2,$ ozone $O_3,$ hydrogen $H_2,$ and water $H_2O$
D
Oxygen $O_2,$ ozone $O_3,$ hydrogen $H_2$

Answer

Correct option: B.

Methane $(CH_4) v,$ ammonia $(NH_3),$ hydrogen $H_2$ and water $H_2O$

the gases used in Urey and Miller experiment in chamber marked $A$ are Methane $(CH_4),$ ammonia $(NH_3),$ hydrogen $H_2,$ and water $H_2O$

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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

(b) : 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

Nitrogen fixation is performed by:

A
Blue-green algae and bacteria
B
Green algae and fungi
C
Legumes and cereals
D
Ferns and cycads

Answer

(a) : Blue-green algae and bacteria
Explanation: Blue-green algae and bacteria

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MCQ 81 Mark

A desirable change in genotype of an organism is obtained by:

A
DNA technology
B
DNA replication
C
Protein synthesis
D
mRNA formation

Answer

(a) : DNA technology
Explanation: DNA technology

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MCQ 91 Mark

Which one of the following techniques is employed in test tube baby programme?

A
Intra-Cytoplasmic Sperm Injection
B
Gamete Intra-Fallopian transfer
C
Zygote Intra Fallopian transfer
D
Intra-Uterine Insemination

Answer

(c) : Zygote Intra Fallopian transfer
Explanation: Fertilization outside the followed by embryo transfer is called test-tube. The zygote or early embryo up to 8 blastomeres could transfer into the fallopian tube is called zygote intrafallopian transfer (ZIFT).

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MCQ 101 Mark

The species of animals protected in Kaziranga sanctuary is:

A
Macaca mullata
B
P. leo
C
Panthera tigris
D
Rhinoceros unicornis

Answer

(d) : Rhinoceros unicornis
Explanation: Rhinoceros unicornis

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MCQ 111 Mark

Amniocentesis is a method to:

A
Medical termination of pregnancy
B
Fertilize the egg
C
Sperm Count
D
Detect genetic disorder

Answer

(d) : Detect genetic disorder
Explanation: Amniocentesis is a method to known the chromosome type of foetus. It is used to detect the genetic disorder of foetus by analyzing chromosome. It is misused to known the sex of the foetus.

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MCQ 121 Mark

Among the following, where do you think the process of decomposition would be the fastest?

A
Alpine region
B
Antarctic
C
Dry arid region
D
Tropical rain forest

Answer

(d) : Tropical rain forest
Explanation: Dead plant remains such as leaves, bark, flowers, and dead remains of animals, including fecal matter, constitute detritus, which is the raw material for decomposition. The tropical rain forest produces the highest biomass and hence produces the highest detritus. Hence the rate of decomposition is highest in the tropical rain forest.

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BIOLOGY M.C.Q (1 Marks)

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