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Thursday 23 May 2024

Biology MCQs Part 29 | NTS Biology MCQs With Answer

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Biology  Mcqs for Preparation specially for NTS, ECAT MCAT, CSS, PPSC, ETEA ,KPSC, EPPSC, PPSC, , and other test. here you will find Biology  mcqs.

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          10.4) Biological Consequences of Smoking



271.     Which organ is at the highest risk of developing cancer due to smoking?

            (A) Liver

            (B) Lungs

            (C) Intestines

            (D) Heart



272.     How many known carcinogens are found in tobacco smoke?

            (A) 10

            (B) 25

            (C) 69

            (D) 100



273.     What is the main component of the particulate matter inhaled by a smoker?

            (A) Nicotine

            (B) Carbon monoxide

            (C) Benzene

            (D) Tar



274.     Which chemical in cigarettes is known to increase heart rate and blood pressure?

            (A) Nicotine

            (B) Tar

            (C) Benzene

            (D) Formaldehyde


275.      What does carbon monoxide in cigarette smoke combine with in the blood?

             (A) White blood cells

             (B) Red blood cells

             (C) Platelets

             (D) Plasma



276.     Which chemical found in cigarettes is a major cause of blood cancer (leukaemia)?

            (A) Benzene

            (B) Formaldehyde

            (C) Cadmium

            (D) Arsenic



277.     How many different metals are found in cigarette smoke?

            (A) 10

            (B) 20

            (C) 30

            (D) 40



278.      Which radioactive compounds are found in cigarettes?

             (A) Only lead

             (B) Multiple carcinogens

             (C) Only arsenic

             (D) Only cadmium



279.     During exercise, what increases to meet the body's demand for more oxygen?

            (A) Heart rate

            (B) Blood pressure

            (C) Rate and depth of breathing

            (D) Platelet count



280.     What part of the brain detects increased levels of carbon dioxide in the blood?

            (A) Cerebellum

            (B) Cerebrum

            (C) Medulla

            (D) Hypothalamus



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