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Zoology MCQs for NEET — Practice Questions with Answers

Practice free Zoology NEET multiple-choice questions online with instant answers and detailed explanations. No login required.

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pH suitable for ptyalin actions is ( A.F.M.C. -1996)

A. 6-8 B. 7-8 C. 3-2 D. 9-3

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Jaundice is a disease of (A. P. M.E.E. -1999)

Kidney

Liver

Pancreas

Duodenum

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Digestive juice contains catalytic agents called (Pb.P.M.T. -2000)

A. Vitamins B. Hormones C. Enzymes D. Nitrates

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In small intestine, active absorption occurs in case of (A.M.U. -2001)

A. Glucose B. Amino acids C. Nad⁺d D. All the above

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What is cholecystikinin (Orissa -2002)

A. Bile pigment B. Gastro-intestinal hormone C. Enzyme D. Lipid

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Alternative forms of a gene are called

Loci

Multiples

Chromosomes

Alleles

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Explanation

An alternative form of a gene is known as an allele. Alleles vary in their sequence which may or may not result in a variant phenotype of a particular trait. Alleles represent variations of a gene that is responsible for a particular trait. eg: ABO blood groups in humans are a good example of multiple alleles.

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Heredity or inheritance of specific traits became clearer due to

A. Lamarck's theory B. Mendel worked on garden peas C. Darwinism D. Neo-Darwinism

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Explanation

Gregor Mendel's work on garden peas laid the foundation for understanding the inheritance of specific traits. His experiments and subsequent laws of inheritance explained how traits are passed from parents to offspring, making heredity clearer.

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Which of the following sentences is true about the evolutionary process?

A. There is no real 'progress' in the idea of evolution. B. humans are unique, a totally new type of organism. C. progress is nature's religion. D. Evolution of life forms was rapid in the beginning ages.

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Microevolution takes place due to

A. somatogenic variation B. blastogenic variation C. continuous variation D. Successive variation

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Explanation

Microevolution refers to small-scale changes within a species, primarily due to genetic variations that occur at the level of genes (blastogenic variation). These genetic changes can lead to differences in traits within a population.

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The difference between Homo sapiens and the Homo erectus was

A. Homo sapiens originated in Africa while Homo erectus was in Asia B. Homo erectus were much smaller in size than homo sapiens. C. Homo erectus stayed in Africa while Homo sapiens did not. D. The size of their brain of Homo eructus was smaller to homo sapiens

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Explanation

The primary difference between Homo erectus and Homo sapiens is in the size of their brains. Homo erectus had a smaller brain relative to Homo sapiens. This difference is significant in terms of the cognitive and technological advancements that are attributed to Homo sapiens.

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