Question Bank – Life process and control and coordination

Very short answer type questions

1. i) Name the following

a) Three carbon molecule that is formed due to the breakdown of glucose during

respiration.

b) The nitrogenous waste that is removed from the blood in our kidneys.

ii) How do unicellular organisms generally remove waste?

2. i) State the function of the following plant hormones

a) Abscisic acid b) Cytokinin

ii) Define chemotropism.

3. Draw a labeled diagram of stomata. Write the two functions of stomata.

4. Which are the first simple molecules of food produced during photosynthesis? What
happens to

these simple molecules in the leaves later?

5. What are the end products formed during fermentation in yeast? Under what condition a
similar
process takes place in our body that leads to muscle cramps?

6. What is feedback mechanism? Explain this mechanism with the help of suitable example.
7. Name the type of blood (oxygenated / deoxygenated) transported by each of the
following mentioning
the path (ie., one organ (which place) to another (which place).
8. In the each of the following situations, What happens to the rate of photosynthesis?
a) Cloudy days b) No rainfall in the air
c) Good manuring in the area d) Stomata gets blocked due to dust
9. Name, the two main organs of our central nervous system. Which one of them plays a
major role in sending command to muscles to act without involving thinking process? Name
the phenomenon involved.
10. Which organ secretes a hormone when blood sugar rises in our body? Name the hormone
and name one enzyme released by this organ.
11. Why is it advised to use iodised salt in our diet?
12. Explain the cause of shoots of the plant bending towards light ?z

Short answer type questions

1. Enumerate the event that occurs during the process of photosynthesis.
2. Leakage of blood from vessels reduces the efficiency of pumping system. How is
the leakage prevented?
3. Label the parts (a), (b), (c) and (d) and show the direction of flow of electrical
signals in the given figure.
4.
What does the diagram given below depict?
What are A and B?
Which vessel carries deoxygenated blood to lungs and
which vessel brings oxygenated blood from lungs to heart?
Which half of heart has oxygenated blood?

5. a) Define neuron.
b) Name the parts of the neuron where (i) Information is acquired
(ii) Impulse must be converted into a chemical signal for onward transmission.
6. Given below are some disorders noticed in some patients. It could be due to
malfunctioning of which part of brain: a) Loss of sensation of feeling
b) Lowered ability to salivate
c) Difficulty in maintaining the posture and balance in body.
7. 9. (a) Distinguish between voluntary and involuntary actions of our body. (b) Choose
involuntary actions, amongst the following : Reading, Beating of heart, Salivation in the
mouth on viewing tasty food, Talking.

Long answer type questions

1. a) Draw a diagram of human alimentary canal and label the following
i) Part in which starch digestion starts.
ii) Part in which bile is stored.
 b) Mention the role of hydrochloric acid in the stomach.
c) What is emulsification of fat?

2. Give reasons
i) Ventricles have thicker muscular walls than atria.
ii) Transport system in plants is slow.
iii) Circulation of blood in aquatic vertebrate differs from that in terrestrial vertebrate.
iv) During the daytime, water and minerals travel faster through xylem as compared to
night.
v) Veins have valves whereas arteries do not.
3.a) Name chemical messenger of endocrine glands responsible for changes taking place in
the body.
b) Mention the gland which produces adrenalin and write its function c) Name two
phytohormones
4. Mention one function for each of these hormones. i) Thyroxine ii) Insulin iii) Estrogen
iv) Growth
hormone v) Testosterone.
5. Smita’s father was complaining about frequent urination, pain in legs and a frequent
weight loss to Smita’s mother and she discussed the things with her daughter when Smita
returned from school. Listening to this Smita told her mother that her father should go and
visit a doctor immediately. The doctor diagnosed that Smita’s father was having an 93
elevated level of blood glucose. He should take care of his diet and should exercise regularly
to maintain his normal glucose level. On the basis of the text, answer the following
questions: (i) Name the disease he is suffering from and name the hormone whose deficiency
causes it. (ii) Identify the gland that secretes it and mention the function of this hormone. (iii)
Explain how the time and amount of secretion of this hormone is regulated in human system.

Case Based Questions

1. The excretory system of human beings includes a pair of kidneys, a pair of ureters, a
urinary bladder and
a urethra. Kidneys are located in the abdomen, one on either side of the backbone. Urine
produced
 in the kidneys passes through the ureters into the urinary bladder where it is stored until it
is released
through the urethra.
a) What is the purpose of making urine?
b) What is Bowman’s capsule?
c) What is dialysis?
d) What are the different parts of nephrons?

Study the table related to haemoglobin levels and answer the questions that follows

Table A: Haemoglobin level chart Table B: Haemoglobin levels of

patients

Remarks Haemoglobin (g/dL)

9-7
Doctor’s advice
7-4
needed
Good 10-13
Excellent 14-16
Checking Time Haemoglobin (g/dL)
Patient X Patient Y
Blood test 4 6

i) Refer to table B showing the haemoglobin level reports of patients X and Y. Which
disease can be diagnosed from the given data?
ii) Name the element which is transported by haemoglobin from lungs to all parts of the
body.
iii) What is the excellent haemoglobin level in human body?
iv) Which mineral is necessary to make haemoglobin?
3. In pea plants, green threads called tendrils tends to coil around the support and help the
shoot to climb around the support. A young tendril performs circular movements. When it
comes in contact with a support, it coils around it. The part of the tendril in contact with the
support does not grow as fast as the part of the tendril away from the support. This is caused
due to high amount of auxin on the part of tendril away from support. Coiling of tendril is a
tropic movment in response to stimulus of contact. It is called thigmotropism.

a) What is tropic movement?

b) Why does the part of tendril grows slow compare to the part away from the support?
c) Thigmotropism is bending towards unidirectional stimulus of _________.
d) Which part of the pea plant best exhibits thigmotropism?

4. Our body needs to remove the wastes that build up from cell activities and from digestion.
In these wastes are not removed, then our cells can stop working and we can get very sick.
The organs of our excretory system help to release wastes from our body. The excretory
system consists of a pair of kidneys, a pair of ureters, a urinary bladder and a urethra. Each
kidney is made up of a nearly one million complex tubular structures called nephrons. The
formation of urine involves various processes that takes place in the different parts of
nephron. Each nephron consists of a cup-shaped upper end called Bowman’s capsule
containing a bunch of capillaries called glomerulus. Bowman’s capsule leads to tubular
structure-proximal convoluted tubule, loop of Henle and distal convoluted tubule which
ultimately joins the collecting tubule.
i) The following substances are the excretory products in animals. Choose the least toxic
form.
a) Urea b) Ammonia c) Uric acid d) CO2
ii) A person who is not taking food or beverages will have ____________.
a) little glucose b) excess urea c) less urea d) little fat
iii) Glomerular filtrate is first collected by
a) distal convoluted tubule b) Bowman’ capsule
c) proximal convoluted tubule d) loop of Henle