Test 16 (Class 11) - Type Bio SCAN (Old NCERT)Contact Number: 8527521718Test 16 (Class 11) - Type Bio SCAN (Old NCERT)Contact Number: 8527521718During non-cyclic photophosphorylation, when electrons are lost from the reaction center at PS II, what is the source which replaces these electrons?
| 1. | Oxygen | 2. | Water |
| 3. | Carbon dioxide | 4. | Light |
Identify the incorrect statement regarding transport in plants:
1. Hydrogen bonding causes high cohesion between water molecules that helps in the rise of water in tall trees.
2. Root pressure in some angiosperm may be considerable yet not enough to raise water to the tops of tall trees.
3. Transpiration pull along with cohesion between water molecules is sufficient to raise the water in the xylem in even the tallest trees.
4. Gymnosperms can sometimes develop especially high root pressure, which may account for the rise of water in tall pine trees without transpiration pull.
Fermentation regenerates:
1.
2.
3. acetyl-CoA
4. ATP
In aerobic cellular respiration, oxygen is actually directly used only by:
1. Glycolysis
2. Oxidation of pyruvate
3. Kreb’s cycle
4. Electron transport
First action spectrum of photosynthesis was described by:
1. Joseph Priestley
2. T. W. Engelmann
3. Robin Hill
4. C. B. van Neil
The number of substrate level of phosphorylations in one turn of citric acid cycle is:
| 1. | One | 2. | Two |
| 3. | Three | 4. | Four |
Which of the following minerals required by a plant is not a ‘macronutrient’?
1. Iron
2. Sulfur
3. Potassium
4. Calcium
The three boxes in this diagram represent the three major biosynthetic pathways in aerobic respiration. Arrows represent net reactants or products.
Arrows numbered 4, 8, and 12 can all be:
| 1. | ATP | 2. | A2O |
| 3. | FAD+ or FADH2 | 4. | NADH |
Phosphoenol pyruvate (PEP) is the primary acceptor in
1. -plants
2. -plants
3. -plants
4. and -plants
Which of the following controls the uptake of mineral ions into the xylem in vascular plants?
1. Cells in the epidermis
2. Cells in the ground tissue
3. Endodermal cells
4. Cells in the pericycle
Match each item in Column I with one in Column II and select the best match from the codes given:
|
|
Category of minerals |
|
Examples |
|
A |
Component of biomolecules |
P |
Nitrogen |
|
B |
Component of energy related compounds |
Q |
Phosphorus |
|
C |
Enzyme activators or inhibitors |
R |
Zinc |
|
D |
Alter the osmotic potential |
S |
Potassium |
Codes:
|
|
A |
B |
C |
D |
|
1. |
P |
Q |
R |
S |
|
2. |
Q |
P |
S |
R |
|
3. |
S |
R |
Q |
P |
|
4. |
R |
P |
Q |
S |
For each NH3 produced, the number of ATP molecules required by the nitrogenase enzyme is:
1. 4
2. 8
3. 12
4. 16
Carbohydrates are commonly found as starch in plant storage organs. Which of the following five properties of starch (A-E) make it useful as a storage material?
| A. | Easily translocated |
| B. | Chemically non-reactive |
| C. | Easily digested by animals |
| D. | Osmotically inactive |
| E. | Synthesized during photosynthesis |
The useful properties are
| 1. | (B) and (C) |
| 2. | (B) and (D) |
| 3. | (A), (C) and (E) |
| 4. | (A) and (E) |
Match the following and choose the correct option:
|
A.Leaves |
i. Anti-transpirant |
|
B.Seed |
ii.Transpiration |
|
C.Roots |
iii.Negative osmotic potential |
|
D. Aspirin |
iv.Imbibition |
|
E.Plasmolyzed cell |
v.Absorption |
Options:
1. A-iii, B-iv, C-i, D-v, E-ii
2. A-ii, B-iv, C-v, D-i, E-iii
3. A-iii, B-ii, C-iv, D-v, E-i
4. A-iii, B-ii, C-i, D-iv, E-v
CAM plants:
| 1. | fix carbon dioxide during the night into organic acids. |
| 2. | fix carbon dioxide into organic acids in the bundle-sheath cells during the day. |
| 3. | fix carbon dioxide into pyruvate in the mesophyll cells during the night. |
| 4. | use both photosystems I and II at night. |
Plasmodesmata are:
1. Connections between adjacent cells
2. Lignified cemented layers between cells
3. Locomotory structures
4. Membranes connecting the nucleus with plasmalemma
Assertion: The mutualistic association between the fern Azolla and the cyanobacterium Anabaena azollae is important agriculturally.
Reason: The water fern Azolla harbouring Anabaena is an important green manure for rice culture.
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.
"Foolish seedling" disease of rice led to the discovery of:
1. GA
2. ABA
3. 2, 4-D
4. IAA
In the given diagram showing anatomical regions of the human stomach, A, B and C respectively represent:
Which one of the following growth regulators is known as "stress hormone" ?
1. Abscisic acid
2. Ethylene
3.
4. lndole acetic acid
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
(nutrient) (deficiency)
I. Protein A. Marasmus
II. Protein & energy B. Kwashiorkor
III. Iodine C. Mental retardation
IV. Iron D. Anemia
Codes:
I II III IV
1. A B C D
2. B A D C
3. B A C D
4. A B D C
How does pruning help in making the hedge dense?
| 1. | It includes the differentiation of new shoots from the rootstock |
| 2. | It frees axillary buds from apical dominance |
| 3. | The apical shoot grows faster after pruning |
| 4. | It releases wound hormones |
Which of the following guards the opening of hepatopancreatic duct into the duodenum?
1. Ileocaecal valve
2. Pyloric sphincter
3. Sphincter of Oddi
4. Semilunar valve
The typical growth curve in plants is:
Process of digestion is accomplished by —
1. Only mechanical process
2. Only chemical process
3. Neither mechanical nor chemical process
4. Both mechanical and chemical processes
Identify the incorrectly matched pair:
|
|
Type of synovial joint |
Example |
|
1. |
Gliding |
Between carpals and radius |
|
2. |
Pivot |
Atlanto-axial |
|
3. |
Saddle |
Between carpal and metacarpal of thumb |
|
4. |
Hinge |
Knee |
Person with blood group AB is considered as universal recipient because he has:
| 1. | both A and B antigens on RBC but no antibodies in the plasma |
| 2. | both A and B antibodies in the plasma |
| 3. | no antigen on RBC and no antigens in the plasma |
| 4. | both A and B antigens in the plasma but no antibodies |
T waves on an ECG represent
1. depolarization of the ventricles.
2. repolarization of the ventricles.
3. depolarization of the atria.
4. repolarization of the atria.
Consider the two statements:
I. ADH and RAAS work together in maintaining osmoregulatory homeostasis.
II. ADH and RAAS work antagonistically; ADH stimulates water reabsorption during dehydration and RAAS removal of water when it is in excess in body fluids.
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
Which cells are the rarest leukocytes?
1. monocytes
2. basophils
3. eosinophils
4. lymphocytes
Which of the following values is not equal? [Page 272]
1. Partial pressure of carbon dioxide in deoxygenated blood and partial pressure of carbon dioxide in tissues
2. Partial pressure of carbon dioxide in oxygenated blood and partial pressure of oxygen in tissues
3. Partial pressure of oxygen in deoxygenated blood and partial pressure of carbon dioxide in alveoli
4. Partial pressure of oxygen in alveoli and partial pressure of oxygen in oxygenated blood pumped by left ventricle
Overlap between actin and myosin myofilaments in a sarcomere is seen in:?
1. A band
2. H zone
3. I band
4. M line
All the components of the nodal tissue are autoexcitable. Why does the SA node act as the normal pacemaker?
| 1. | SA node has the lowest rate of depolarisation |
| 2. | SA node is the only component to generate the threshold potential. |
| 3. | Only SA node can convey the action potential to the other |
| 4. | SA node has the highest rate of depolarisation. |
The binding of Hb to oxygen is primarily related to
1. Partial pressure of oxygen
2. Partial pressure of carbon dioxide
3. Hydrogen ion concentration
4. Temperature
The proximal convoluted tubule of the nephron in the human kidney is lined with:
1. Simple cuboidal brush bordered epithelium
2. Simple columnar brush bordered epithelium
3. Transitional epithelium
4. Pseudostratified columnar ciliated epithelium
Consider the following statements:
| I: | Myaesthenia gravis is an autoimmune disorder affecting neuromuscular junction. |
| II: | Muscular dystrophy is a progressive degeneration of skeletal muscles mostly due to genetic disorder. |
| III: | Tetany is rapid spasms in muscle due to high Ca++ in body fluid. |
Which of the above statements are true?
1. I and II only
2. I and III only
3. II and III only
4. I, II, and III
The type of synovial joint seen at the carpal and the metacarpal of thumb is called as:
1. Gliding or plane joint
2. Pivot joint
3. Saddle joint
4. Condyloid joint
The maximum amount of air a person can breathe out after a forced inspiration is called as:
1. Expiratory capacity
2. Expiratory reserve volume
3. Functional residual capacity
4. Vital capacity
Consider the following statements:
| I: | 70% of ventricular filling is due to the passive opening of AV valves. |
| II: | Lub is caused by the simultaneous closure of both AV valves. |
| III: | Dub is caused by simultaneous closure of both the semilunar valves. |
Which of the above statements are true?
| 1. | I and II only | 2. | I and III only |
| 3. | II and III only | 4. | I, II, and III |
Contraction of the diaphragm:
1. increases the volume of the thoracic chamber in dorso-ventral axis.
2. increases the volume of the thoracic chamber in antero-posterior axis.
3. decreases the volume of the thoracic chamber in dorso-ventral axis.
4. decreases the volume of the thoracic chamber in antero-posterior axis.
Uricotelic mode of passing out nitrogenous wastes is found in
1. birds and annelids
2. amphibians and reptiles
3. insects and amphibians
4. reptiles and birds
Which part of the nephrons is impermeable to water?
1. Proximal convoluted tubule
2. Distal convoluted tubule
3. Ascending limb of loop of Henle
4. Descending limb of loop of Henle
Identify the hormone with its correct matching of source and function:
| 1. | Oxytocin- posterior pituitary, growth and maintenance of mammary glands. |
| 2. | Melatonin- pineal gland, regulates the normal rhythm of sleep-wake cycle. |
| 3. | Progesterone- corpus-luteum, stimulation of growth and activities of female secondary sex organs. |
| 4. | Atrial natriuretic factor- ventricular wall increases blood pressure. |
Each time the sodium-potassium pump works, it transports:
1. three sodium ions to the outside and brings two potassium ions to the inside
2. two sodium ions to the outside and brings three potassium ions to the inside
3. three potassium ions to the outside and brings two sodium ions to the inside
4. two potassium ions to the outside and brings two potassium ions to the inside
The body's circadian rhythm is primarily regulated by:
1. thymus
2. pineal
3. thyroid
4. pituitary
Identify the correct statement regarding the following diagram:
1. B and F are filled with endolymph
2. C is filled with perilymph
3. Hair cells press against E to generate nerve impulses
4. D is the sensory organ of hearing and has auditory receptors
Which of the following is an accumulation and release centre of neurohormones?
1. Posterior pituitary lobe
2. Intermediate lobe of the pituitary
3. Hypothalamus
4. Anterior pituitary lobe
What would not be true for steroid hormones like corticosteroids?
1. Steroids are lipids with complex ring structures.
2. Steroids can pass through their target cell membrane and interact with receptors in the nucleus.
3. Steroids employ first and second messengers that amplify the cellular response.
4. The estrogens and testosterone are examples of steroid hormones.
The brain stem does not include:
1. medulla
2. pons
3. midbrain
4. cerebral cortex
In the given diagram the structure that controls the size of pupil is shown by the number:
1. 2
2. 3
3. 4
4. 6
