Which part of the human brain controls involuntary functions like breathing and heartbeat? MCQ with Answer and Explanation

Which part of the human brain controls involuntary functions like breathing and heartbeat?
A. Medulla oblongata
B. Cerebellum
C. Hypothalamus
D. Cerebrum
Answer: Option A
Solution (By JKSSB Mock Tests)
The medulla oblongata, part of the brainstem, contains vital centers that control respiration, heart rate, and blood pressure. It also regulates reflex actions like coughing, swallowing, and vomiting. The cerebrum is for voluntary actions and thinking, cerebellum for coordination, and hypothalamus for homeostasis and endocrine control.

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The genetic makeup of an organism is its:
A. Allele
B. Karyotype
C. Phenotype
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Correct Answer: Option D


Explanation:
Genotype refers to the specific set of genes (allelic constitution) of an individual, e.g., TT, Tt, or tt for a trait. Phenotype is the observable characteristic, karyotype is the chromosome complement, allele is a variant form of a gene. The genotype determines the potential phenotype.

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Question #2
The pigment that gives red and purple color to some fruits like grapes and berries is:
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B. Carotenoid
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Correct Answer: Option C


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Anthocyanins are water-soluble vacuolar pigments that appear red, purple, or blue depending on pH. They are flavonoids. Chlorophyll is green, carotenoids yellow/orange, lycopene red.

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Question #3
What is the correct sequence of taxonomic hierarchy from highest to lowest?
A. Kingdom, Class, Phylum, Order, Family, Genus, Species
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Correct Answer: Option B


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