Class 10 Science and Technology Part 2 – Chapter 1: Heredity and Evolution MCQ
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What is the process of forming mRNA from one strand of DNA called?
Chapter 1: Heredity and Evolution
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Answer: B. Transcription
Synthesis of RNA as per the nucleotide sequence of DNA is transcription.Which base is present in RNA in place of the thymine of DNA?
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Answer: D. Uracil
RNA has uracil instead of thymine; the other three bases are common to both.The code for one amino acid on mRNA is made of how many nucleotides?
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Answer: C. Three
Each amino acid is coded by a group of three nucleotides, called a triplet codon.Which scientist of Indian origin shared the 1968 Nobel Prize for work on the triplet codons of the 20 amino acids?
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Answer: A. Dr Har Govind Khorana
Dr Har Govind Khorana helped discover the codons for all 20 amino acids and got the Nobel Prize in 1968.Which of these is a vestigial organ in the human body?
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Answer: C. Coccyx (tail bone)
The coccyx, wisdom teeth, appendix and ear muscles are useless (vestigial) in humans; the others are working organs.Who developed the carbon dating method, based on the radioactive decay of C-14?
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Answer: D. Willard Libby
Willard Libby developed carbon dating and received the Nobel Prize in 1960 for it.The duck-billed platypus lays eggs like reptiles. Which features link it to mammals?
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Answer: A. Mammary glands and hair
Its mammary glands and body hair relate it to mammals, so it is a connecting link between reptiles and mammals.Peripatus is a connecting link between which two groups?
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Answer: D. Annelida and Arthropoda
It has a segmented body like annelids and tracheal respiration with open circulation like arthropods.Lamarck said the giraffe's neck became long because generations kept stretching it to reach leaves. This idea is part of which theory?
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Answer: B. Inheritance of acquired characters
Lamarck's use-and-disuse examples are acquired characters said to pass to the next generation (Lamarckism).The human hand, the flipper of a whale and the patagium of a bat look different but have similar bones and joints. This is which type of evidence of evolution?
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Answer: B. Anatomical evidence
Similarity in the internal structure of bones and joints of organs is anatomical evidence of common ancestry.
All questions are written by PadhaiNotes in our own words from this chapter of the official Maharashtra State Board Balbharati textbook.