Tag: biology

Quizzes (1160) Questions (12174)

Questions Related to biology

Multiple choice biology nervous system of man reflex action innate and learned behaviour coordination in human beings- chemical control

Choose the correct answer from the alternatives given.
Which of the following are the first and last elements in a spinal reflex?

  1. Axon and dendrite

  2. Sense organ and muscle effector

  3. Ventral horn and dorsal horn

  4. Motor neuron and sensory neuron
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

  • Receptor - sense organ in the skin, muscle, or another organ.
  • Sensory neuron - carrier impulse within CNS
Interneuron - carrier impulse within CNS
  • Motor neuron - carrier impulse towards CNS
  • Effector - structure by which an animal responds.
So, the correct option is 'Sense organs and muscle effector'.

Multiple choice biology respiratory system of human diseases caused by changes in lifestyle diseases and toxic substance non-infectious diseases

What are symptoms of carbon monoxide exposure?

  1. Loss?of consciousness

  2. Memory problems

  3. Vomiting

  4. Both a and b
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Carbon monoxide is a toxic gas that interferes with oxygen transport in the blood. Common symptoms include headaches, dizziness, weakness, nausea, vomiting, and loss of consciousness.

Multiple choice biology keeping diseases away diseases caused by changes in lifestyle diseases and toxic substance non-infectious diseases

The most basic amino acid is

  1. Arginine

  2. Hisstidine

  3. Glycine

  4. Glutamine
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Glutamine and Glycine are not basic amino acids. Only Arginine and Histidine are basic amino acids. Histidine is weakly charged under physiological ph. Hence, Arginine is the most basic amino acid. 

So the correct option is 'Arginine'.

Multiple choice biology respiratory system of human diseases caused by changes in lifestyle diseases and toxic substance non-infectious diseases

The carcinogenic ingredient of tobacco smoke is

  1. Nicotine

  2. Polycyclic aromatic hydrocarbon

  3. Carbon monoxide

  4. Tar
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Polycyclic aromatic hydrocarbons are a group of chemicals that are formed during the incomplete burning of coal, oil, gas, wood, garbage or other organic substances, such as tobacco and charbroiled meat.
They are the carcinogenic or cancer-causing substance in the tobacco smoke.
Therefore, the correct answer is option B.

Multiple choice biology respiratory system of human diseases caused by changes in lifestyle diseases and toxic substance non-infectious diseases

Smoking can result in 

  1. Fever

  2. Death

  3. Head ache

  4. All of the above
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Smoking is associated with significant morbidity and mortality. Smoking still remains one of the leading causes of preventable death. Smoking has the dubious distinction of affecting all the systems from head to foot. Cigarette smoking causes many types of cancer. It also increases the risk of cardiovascular diseases. Exposure to tobacco smoke during pregnancy can lead to delivery complications and increase the risk of health problems in the newborn. Quitting smoking significantly reduces the health risks caused by exposure to tobacco smoke. 

So, the correct answer is 'Death'.

Multiple choice biology respiratory system of human diseases caused by changes in lifestyle diseases and toxic substance non-infectious diseases

Emphysema is a condition resulting from

  1. cigarette smoking

  2. liquor consumption

  3. drug addiction

  4. reduced oxygen carrying capacity of blood.
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Emphysema is a respiratory disorder which occurs due to the inflation or abnormal distension of the bronchioles or alveolar sacs resulting in the loss of their elasticity. Cigarette smoking and chronic bronchitis are the causes of this disease.

Multiple choice biology keeping diseases away diseases caused by changes in lifestyle diseases and toxic substance non-infectious diseases

What part of hemoglobin is affected in sickle cell anaemia?

  1. $\alpha$-polypeptide chains
  2. $\beta$-polypeptide chains
  3. Both $\alpha$- and $\beta$- polypeptide chains

  4. None of these
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Hemoglobin has four chains: two alpha chains and two beta chains with heme and iron part along with oxygen. There are some hydrophobic substances (water-hating) present on the surface of proteins. These hydrophobic residues forms cluster and pocket-like structure on the surface of beta chains. These pockets are responsible for diseases like sickle cell anemia also in the beta chain the position of glutamic acid at sixth place in the chain is replaced by valine leading to the shape of red blood cells to be sickle-like due to loss of oxygen.

So, the correct option is 'Beta-polypeptide chains'.

Multiple choice biology respiratory system of human diseases caused by changes in lifestyle diseases and toxic substance non-infectious diseases

Incidence of Emphysema - a respiratory disorder is high in cigarette smokers. In such cases

  1. the bronchioles are found damaged

  2. the alveolar walls are found damaged

  3. the plasma membrane Is found damaged

  4. the respiratory muscles are found damaged.
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Emphysema is. a condition of short breath due to breakdown of alveolar wall and'reduction of respiratory area due to smoking.