MCQ
Tobacco smoke contains carbon monoxide which
  • Reduces the oxygen-carrying capacity of blood
  • B
    Causes gastric ulcers
  • C
    Raises blood pressure
  • D
    Is carcinogenic

Answer

Correct option: A.
Reduces the oxygen-carrying capacity of blood
a
(a) Because $CO$ has higher affinity to combine with haemoglobin of blood than oxygen.

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Similar questions

Select the true statements

$I.$ Cancer can be detected by the use of antibodies against cancer specific antigens for certain type of cancer

$II.$ The tumor cells are surgically removed to reduce the load of cancerous cells

$III.$ Certain chemotherapeutic drugs are used to kill the cancerous cells, but majority of the drugs have side effects like hair loss, anaemia, etc.

The technique called Gamete Intra Fallopian Transfer $(GIFT)$ is recommended for the females
Which part of the brain is directly concerned with the control of heart
Match List $I$ with List $II$ related to digestive system of cockroach.

List $I$ List $II$
$A$ The structures used for storing of food $I$ Gizzard
$B$ Ring of $6-8$ blind tubules at junction of foregut and midgut. $II$ Gastric Caeca
$C$ Ring of $100-150$ yellow coloured thin filaments at junction of midgut and hindgut. $III$ Malpighian tubules
$D$ The structures used for grinding the food. $IV$ Crop

Choose the correct answer from the options given below:

Which one of the following animals is a coelenterate
Select the correct match
ClassPhylum/Division
A. Mammaliai. Arthropoda
B. Insectaii. Angiospermae
C. Dicotyledonaeiii. Angiospermae
D. Monocotyledonaeiv. Gymnosperm
Which of the following groups of plants are highly useful in increasing soil fertility
Assertion: Sometimes the change in allele frequency is so different in the new sample of population that they become a different species.
Reason: When migration of a section of population to another place occurs by chance, it is called genetic drift.
Statement I: Ball and socket joint is present between humerus and pectoral girdle.
Statement II: Saddle joint is present between carpal and metacarpal of thumb.
Age of fossil is determined by