Subject

Biology

Class

NEET Class 12

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 Multiple Choice QuestionsMultiple Choice Questions

51.

Elephantiasis is caused by

  • Entamoeba coli

  • trematodes

  • cestodes

  • Wuchereria bancrofti


D.

Wuchereria bancrofti

Elephantiasis is caused by Wuchereria bancrofti. It is called so due to enormous swelling of affected part.


52.

Which one of the following codons codes for the some information as UGC?

  • UGU

  • UGA

  • UAG

  • UGG


A.

UGU

Wobble Hypothesis helps to understand why multiple codons can code for a single amino acid. UGC and UGU suggest wobble hypothesis and both stand for same amino acid cystin.


53.

If a boy's father has haemophilia and his mother has one gene for haemophilia, what is the chance that the boy will inherit the disease?

  • 100%

  • 50%

  • 0%

  • 75%


B.

50%

Haemophilia is a X-linked recessive disorder. The presence of single X-chromosome (with haemophilia gene) show the disease in male. Therefore, in the above example, boy chances of inheriting the disease is 50%.


54.

On the basis of utility, Nagpuri buffaloes are categorized as

  • milkers

  • dual purpose

  • drought cattle

  • grazers


A.

milkers

Nagpuri buffoles are categorized as milkers. They also include Murrah, Jafferabadi, Nili, Ravi and Surti.


55.

What type of sorus is present in Nephrolepsis?

  • Coenosorus

  • Simple

  • Mixed

  • None of these


C.

Mixed

Sporangia arise without any order of development, therefore, called mixed type, e.g., Nephrolepis.


56.

Rarely observed phenotype in population is called

  • wild type

  • mutant type

  • variant type

  • All of these


B.

mutant type

Wild type refers to a strain, organism or gene, that is predominant in the wild population, while mutant form is observed rarely.


57.

Pureline breed refers to

  • homozygosity

  • heterozygosity

  • homozygosity with only dominant genes

  • heterozygosity and linkage


A.

homozygosity

Pure line breed refers to a group of identical individuals that always produce offspring of the same phenotype when intercrossed. This occurs only when they are homozygous.


58.

Male mosquito is not sanguivore as

  • it lacks cutting and biting mandibles

  • it does not require any kind of proteins

  • it lacks smelling power

  • All of the above


C.

it lacks smelling power

Sanguivorous feed on blood and thus have sucking type of mouth parts male mosquito has not such parts.


59.

The movements of neutrophils to the site of inflammation is due to

  • release of hormone

  • Chemotaxis

  • activity of antigens

  • activations of antigens


B.

Chemotaxis

Chemotaxis is the movement of an organism in response to a chemical stimulus. Neutrophils movement to the site of inflammation is due to chemotaxis. 


60.

Which of the following plant is efficient converter of solar energy whose net productivity is 2-4 kg/m2/yr or even higher?

  • Wheat

  • Rice

  • Sugarcane

  • Bajra


C.

Sugarcane

Sugarcane is the plant which is a converter of solar energy whose net productivity is 2-4 kg/m2/yr . This is because it is a photosynthetic C4 plant and it does not perform photrespiration.