12th Class Biology MCQS Evolution

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If the condon consisted of only two nucleotides, there would be how many possible condons?
20
8
4
16

In the eighteenth century organisms were classified by
Charles Darwin
Carolus Linnaeus
J.B Lamarck
Alfred Wallace

If an mRNA is synthesized with the differnt codons, what is the minimum number of amino acids in the protein that is formed by the mRNA?
60 Amino acids
62 Amino acids
None of them
64 Amino acids

Jean Baptiste Lamarck published his theory of evolution in
1859
1757
1809
1945

In mitochodria UGA codon act to specify __________ instead stop codon:
Valine
Argenine
Trytophan
Glumatic acid

Some amoeboflagellates ingested cyanobacteria and led to the development of
Chloroplasts
Mitochondria
Golgi apparatus
Vacuoles

The most threatened areas on the earth have been reduced to 44% of their original extent are
Carbiniferous forests
Tropical rain forests
Deciduous rain forests
Temperate rain forests

Among the birds Drawin collected 13 types of
Finshes
Pterodactyls
Robins
Ferrets

If all members of a population are homozygous for the same allele that allele is said to be
Multiple allele
Fixed in the gene
Jumping gene
Perfect gene

Which one of the fllowing acts as a stop codon?
UAG
UGC
UGG
UGU

Armadillos the armoured mammals live only in the
America
Asia
Africa
Europe

The parts of the body used extensively to cope with the environment become larger and stronger while those that are not used deteriorate was argued by
J.B Lamarck
Charles Drawin
Alfred Wallace
Carolus Linnaeus

Eukaryotes are thought to have first appeared about____billion years ago
1.3
1.4
1.5
1.2

The total aggregate of genes in a population at any one time is called the populations gene
Pool
Lake
Pond
Puddle

Endangered species of plants have been recorded to more than
200
300
500
400

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