Test 21 (Class 11) - Type Bio SCAN (Old NCERT)Contact Number: 8527521718Test 21 (Class 11) - Type Bio SCAN (Old NCERT)Contact Number: 8527521718The structures that are formed by stacking of organised flattened membranous sacks in the chloroplasts are:
The sap in the phloem tissue of a plant always flows from:
1. leaf to root
2. leaf to xylem
3. sugar sink to sugar source
4. sugar source to sugar sink
Photosynthetically active radiation (PAR) represents the following range of wavelengths:
1. 450-950 nm
2. 340-450 nm
3. 400-700 nm
4. 500-600 nm
The products of three turns of Kreb’s cycle will be:
1. 1 ATP, 2 CO2, 3 NADH, and 1 FADH2
2. 3 ATP, 3 CO2, 3 NADH, and 3 FADH2
3. 3 ATP, 6 CO2, 9 NADH, and 3 FADH2
4. 38 ATP, 6 CO2, 3 NADH, and 12 FADH2
Photorespiration is avoided by C4 plants primarily because:
| 1. | They do not participate in the Calvin cycle. |
| 2. | They use PEP carboxylase to initially fix CO2. |
| 3. | They conserve water more efficiently. |
| 4. | They are adapted to cold, wet climates. |
How many ATP molecules could maximally be generated from one molecule of glucose if the complete oxidation of one mole of glucose to CO2 and H2O yields 686 kcal and the useful chemical energy available in the high energy phosphate bond of one mole of ATP is 12 kcal?
| 1. | Two | 2. | Thirty |
| 3. | One | 4. | Fifty-seven |
Deficiency symptoms of nitrogen and potassium are visible first in:
1. Senescent leaves
2. Young leaves
3. Roots
4. Buds
In which one of the following processes CO2 is not released?
1. Aerobic respiration in plants
2. Aerobic respiration in animals
3. Alcoholic fermentation
4. Lactate fermentation
| Assertion: | The primary function of kranz anatomy is to provide a site in which CO2 can be concentrated around RuBisCO, thereby avoiding photorespiration. |
| Reason: | The mesophyll cells have a suberized cell wall and have a low conductance for CO2. |
| 1. | Both assertion and reason are true and the reason is the correct explanation of the assertion. |
| 2. | Both assertion and reason are true but the reason is not the correct explanation of the assertion. |
| 3. | Assertion is true but reason is false. |
| 4. | Both assertion and reason are false. |
Match the terms regarding properties of water in Column I with their explanation in Column II and select the answer from the codes given:
|
|
COLUMN I |
|
COLUMN II |
|
A |
Cohesion |
P |
Attraction of water molecules to polar surfaces |
|
B |
Adhesion |
Q |
An ability to resist a pulling force |
|
C |
Surface tension |
R |
Mutual attraction between water molecules |
|
D |
Tensile strength |
S |
Water molecules attracted to each other in liquid phase more than to water in gas phase |
|
E |
Capillarity |
T |
The ability to rise in thin tubes |
Codes:
|
|
A |
B |
C |
D |
E |
|
1. |
P |
Q |
S |
T |
R |
|
2. |
P |
R |
Q |
S |
T |
|
3. |
P |
R |
S |
Q |
T |
|
4. |
R |
P |
S |
Q |
T |
An element playing important role in nitrogen fixation is:
1. molybdenum
2. copper
3. manganese
4. zinc
Match the following concerning essential elements and their functions in plants:
| Column I | Column II | ||
| (a) | Iron | (i) | Photolysis of water |
| (b) | Zinc | (ii) | Pollen germination |
| (c) | Boron | (iii) | Required for chlorophyll biosynthesis |
| (d) | Manganese | (iv) | IAA biosynthesis |
| (a) | (b) | (c) | (d) | |
| 1. | (iv) | (iii) | (ii) | (i) |
| 2. | (iii) | (iv) | (ii) | (i) |
| 3. | (iv) | (i) | (ii) | (iii) |
| 4. | (ii) | (i) | (iv) | (iii) |
During oxygenic photosynthesis in chloroplasts, the liberated oxygen comes from ______ and the reactions leading to its liberation are associated with ______.
1. CO2, PS II
2. H2O, PSII
3. CO2, Calvin cycle
4. H2O, PS I
A water molecule taken up by the root of the plant from the soil can reach the leaf by passing through a living cell only once. This cell is:
1. root epidermal cell
2. the endodermis
3. a guard cell
4. the root cortex cell
Carbon dioxide provided to a C4 plant is radioactively labeled. As the photosynthesis in this plant gets underway, radioactivity if expected to occur first in:
1. Oxaloacetic acid
2. PEP
3. Malic acid
4. RuBP
Rocks can be split by inserting dry wooden stalks in the crevices of the rocks and soaking them in water. The physiological basis of this phenomenon is:
1. Imbibition
2. Crenation
3. Cytorrhisis
4. Reverse osmosis
During biological nitrogen fixation, the cells of which of the following regions take part in the formation of nodules in roots for bacteroides?
1. Epidermis
2. Cortex
3. Endodermis
4. Vascular bundle
One set of a plant was grown at 12 hours day and 12 hours night period cycles and it flowered while in the other set, the night phase was interrupted by a flash of light and it did not produce a flower. Under which one of the following categories will you place this plant?
1. Darkness neutral
2. Day neutral
3. Short day
4. Long day
Brunner’s glands are located in the duodenal:
1. Mucosa
2. Sub mucosa
3. Muscularis
4. Serosa
Who coined the term 'Kinetin'?
| 1. | Skoog and Miller | 2. | Darwin |
| 3. | Went | 4. | Kurosawa |
Match each item in Column I with one item in Column II and chose your answer from the codes given below:
Column I Column II
I. Gastrin 1. Gall bladder contraction
II. CCK 2. Increased HCl secretion
III. Secretin 3. Bicarbonate secretion from pancreas
IV. GIP 4. Decreased stomach motility
Codes:
I II III IV
A. 1 2 3 4
B. 2 1 4 3
C. 2 1 3 4
D. 1 2 4 3
Which hormone is responsible for fruit ripening:
1. Ethylene
2. Auxin
3. Ethyl chloride
4. Cytokinin
Anxiety and eating spicy food together in an otherwise normal human being, may lead to
1. indigestion
2. jaundice
3. diarrhoea
4. vomiting
One of the commonly used plant growth hormone in tea plantations is:
| 1. | Abscisic acid | 2. | Zeatin |
| 3. | Indole-3- acetic acid | 4. | Ethylene |
In the stomach, gastric acid is secreted by the:-
1. parietal cells
2. peptic cells
3. acidic cells
4. gastrin secreting cells
The neurotransmitter released by the motor neuron at the neuromuscular junction is:
1. Adrenaline
2. Dopamine
3. Acetylcholine
4. Gamma-aminobutyric acid
Globulins contained in human blood plasma are primarily involved in
1. Clotting of blood
2. Defense mechanisms of body
3. Osmotic balance of body fluids
4. Oxygen transport in the blood
If the SA node is not functional in a human being, his ECG would not show:
1. P wave
2. QRS complex
3. ST segment
4. T wave
1. birds and annelids
2. amphibians and reptiles
3. insects and amphibians
4. reptiles and birds
In the nodal tissue of the human heart the last to get activated is/are:
1. SA node
2. AV node
3. AV bundle
4. Purkinje fibers
The maximum volume of air a person can breathe in after a forced expiration is known as :
1. Expiratory Capacity
2. Vital Capacity
3. Inspiratory Capacity
4. Total Lung Capacity
The pivot joint between the atlas and axis is a type of
1. fibrous joint
2. cartilaginous joint
3. synovial joint
4. saddle joint
Blood pressure in the mammalian aorta is maximum during:
Consider the two statements:
I. For breathing it is essential that human lungs are situated in an air tight thoracic chamber.
II. We cannot directly alter the pulmonary volume.
1. Both I and II are correct and II explains I
2. Both I and II are correct but II does not explain I
3. Only I is correct
4. Both I and II are incorrect
| 1. | Henle’s loop – most reabsorption of the major substances from the glomerular filtrate |
| 2. | Distal convoluted tubule – reabsorption of ions into the surrounding blood capillaries |
| 3. | Afferent arteriole – carries the blood away from the glomerulus towards renal vein |
| 4. | Podocytes - create minute spaces (slit pores) for the filtration of blood into the Bowman’s capsule |
In human body, which one of the following is anatomically correct?
1. Floating ribs-2 pairs
2. Collar bones-3 pairs
3. Salivary glands-1 pair
4. Cranial nerves-10 pairs
Glenoid cavity articulates:
| 1. | clavicle with acromion | 2. | scapula with acromion |
| 3. | clavicle with scapula | 4. | humerus with scapula |
The main respiratory center in humans is located in:
1. Hypothalamus
2. Thalamus
3. Medulla oblongata
4. Pons
The cardiac pacemaker in a patient fails to function normally. The doctors find that an artificial pacemaker is to be grafted in him. It is likely that it will be grafted at the site of
1. Purkinje system
2. Sinoatrial node
3. Atrioventricular node
4. Atrioventricular bundle
The trachea divides into a right and a left primary bronchi at the level of:
1. 3rd thoracic vertebra
2. 5th thoracic vertebra
3. 7th thoracic vertebra
4. 12th thoracic vertebra
The amount of carbon dioxide removed by our lungs per day would be approximately:
1. 200 L
2. 288 L
3. 336 L
4. 424 L
Under normal physiological conditions, the glomerular ultrafiltrate should not contain:
1. Urea
2. Bicarbonate ions
3. Proteins
4. Glucose
MSH is secreted by:
1. Anteria lobe of the pituitary
2. Middle lobe of the pituitary
3. Posterior lobe of the pituitary
4. Endostyle
Unmyelinated neurons:
1. are surrounded by Schwann cells and a discontinuous myelin sheath
2. are surrounded by Schwann cells that do not secrete a myelin sheath
3. are not surrounded by Schwann cells or a myelin sheath
4. are surrounded by a discontinuous myelin sheath but no Schwann cells
Which one of the following is not a second messenger in hormone action?
1. cGMP
2. Calcium
3. Sodium
4. cAMP
Which part of human brain is concerned with the regulation of body temperature?
1. Cerebellum
2. Cerebrum
3. Hypothalamus
4. Medulla oblongata
Oxytocin mainly helps in:
1. Milk production
2. Childbirth
3. Diuresis
4. Gametogenesis
Match the following hormones with the respective disease:
| (a) Insulin | (i) Addison's disease |
| (b) Thyroxin | (ii) Diabetes insipidus |
| (c) Corticoids | (iii) Acromegaly |
| (d) Growth Hormone | (iv) Goitre |
| (v) Diabetes mellitus |
Select the correct option.
(a) (b) (c) (d)
1. (ii) (iv) (i) (iii)
2. (v) (i) (ii) (iii)
3. (ii) (iv) (iii) (i)
4. (v) (iv) (i) (iii)
Which is the smallest cranial nerve that innervates the superior oblique muscles of the eye?
1. trochlear
2. abducens
3. oculomotor
4. optic
Each time the sodium potassium pump functions, it pumps:
1. 3 Na+ ions to the inside and 2 K+ ions to the outside
2. 3 Na+ ions to the outside and 2 K+ ions to the inside
3. 2 Na+ ions to the inside and 3 K+ ions to the outside
4. 2 Na+ ions to the outside and 3 K+ ions to the inside