Test 22 (Class 11) - Type Bio SCAN (Old NCERT)Contact Number: 8527521718Test 22 (Class 11) - Type Bio SCAN (Old NCERT)Contact Number: 8527521718Phycoerythrin is the major pigment in :
1. Red algae
2. Blue-green algae
3. Green algae
4. Brown algae
What will be the direction of flow of water when a plant cell is placed in a Hypotonic solution?
1. Water will flow in both directions.
2. Water will flow out of the cell.
3. Water will flow into the cell.
4. No flow of water in any direction.
In Hatch and Slack pathway, the primary CO2 acceptor is -
1. Oxaloacetic acid
2. Phosphoglyceric acid
3. Phosphoenol pyruvate
4. Rubisco
The energy-releasing metabolic process in which substrate is oxidised without an external electron acceptor is called
1. glycolysis
2. fermentation
3. aerobic respiration
4. photorespiration
The catalytic knobs of ATP synthetase in a thylakoid membrane is located:
| 1. | on the side facing the thylakoid space. |
| 2. | on the stroma side of the membrane. |
| 3. | embedded deep within the membrane |
| 4. | on the pigments molecules of Photosystems |
Which of the following statements regarding mitochondria is incorrect?
| 1. | Mitochondrial matrix contains single circular DNA molecule and ribosomes. |
| 2. | Outer membrane is permeable to monomers of carbohydrates, fats, and proteins. |
| 3. | Enzymes of electron transport are embedded in the outer membrane. |
| 4. | Inner membrane is convoluted with infoldings. |
Both Rhizobium and Alnus:
I. are free-living in soil
II. as symbionts can fix atmospheric nitrogen
1. Only I is correct
2. Only II is correct
3. Both I and II are correct
4. Both I and II are incorrect
What percent of ATP produced during glycolysis are the result of substrate level phosphorylation?
1. 0
2. 25
3. 50
4. 100
| Assertion: | Photophosphorylation in chloroplasts and oxidative phosphorylation in mitochondria are different. |
| Reason: | In chloroplasts the high energy electrons come from food while in mitochondria they come from water. |
| 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 List - I with List-II.
| List-I | List-II |
| a. Cohesion b. Adhesion c. Surface tension d. Guttation |
i. More attraction in the liquid phase ii. Mutual attraction among water molecules iii. Water loss in liquid phase iv. Attraction toward polar surfaces |
Choose the correct answer from the options given below:
| Options: | (a) | (b) | (c) | (d) |
| 1. | iii | i | iv | ii |
| 2. | ii | i | iv | iii |
| 3. | ii | iv | i | iii |
| 4. | iv | iii | ii | i |
During biological nitrogen fixation, inactivation of nitrogenase by oxygen poisoning is prevented by?
1. Leghaemoglobin
2. Xanthophylls
3. Carotene
4. Cytochrome
Minerals known to be required in large amounts for plant growth include:
1. phosphorus, potassium, sulphur, calcium
2. calcium, magnesium, manganese, copper
3. potassium, phosphorus, selenium, boron
4. magnesium, sulphur, iron, zinc
During chemiosmosis in the chloroplast:
| 1. | Splitting of water molecule takes place on the outer side of the thylakoid membrane |
| 2. | As electrons move through the photosystems protons are transported from the thylakoid lumen to the stroma |
| 3. | The NADP reductase enzyme is located on the stroma side of the thylakoid membrane |
| 4. | The CF1 portion of the ATP synthase forms a transmembrane channel in the thylakoid membrane |
Xylem translocates:
1. Water, minerals salts, some nitrogen and hormones
2. Water only
3. Water and mineral salts only
4. Water, mineral and some organic nitrogen only
Calvin cycle consumes more ATP than NADPH. What is the source of this extra ATP needed?
1. PS I
2. PS II
3. Cyclic electron flow
4. Linear electron flow
All the following regarding the mechanism of translocation of phloem sap by mass flow hypothesis is true except:
1. At the source, sucrose can be actively transported into phloem.
2. Companion cells control the rate and direction of movement of phloem sap.
3. Differences in osmotic concentration at the source and sink cause a hydrostatic pressure gradient to be formed.
4. The location of a sink can be anywhere in the plant.
Over-watering a plant is dangerous as it
1. leaches all essential minerals.
2. neutralizes the pH of the soil.
3. deprives the roots of oxygen.
4. supports the growth of root parasites.
During seed germination its stored food is mobilized by:
1. Cytokinin
2. ABA
3. Gibberellin
4. Ethylene
Hormonal control of the secretion of digestive juices is carried out by the:
1. Secretion of the hypothalamic releasing and inhibitory factors into a portal vein
2. Synthesis of tropins by the anterior lobe of pituitary gland
3. Sympathetic division of the sutonomic nervous system via the vagus nerve
4. Local hormones produced by gastric and intestinal mucosa
| Assertion: | Some seeds that normally require certain environmental conditions to germinate, break dormancy if they are treated with gibberellins. |
| Reason: | Gibberellins stimulate the synthesis of digestive enzymes that mobilize stored nutrients |
| 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 |
Sphincter of Oddi will guard the opening of:
1. A
2. B
3. C
4. D
Which one of the following acids is a derivative of carotenoids?
1. Indole-butyric acid
2. Indole-3-acetic acid
3. Gibberellic acid
4. Abscisic acid
The number of permanent and deciduous teeth in humans are respectively:
1. 36,36
2. 32,32
3. 32,20
4. 20,32
The production of which of the following plant hormones by the apical bud of a pine tree inhibits the growth of lateral buds?
1. ABA.
2. cytokinin.
3. gibberellin.
4. auxin.
The shortest part of the human intestine is the:
1. transverse colon
2. duodenum
3. descending colon
4. jejunum
Which of the following hormones can play a significant role in osteoporosis?
1. Estrogen and Parathyroid hormone
2. Progesterone and Aldosterone
3. Aldosterone and Prolactin
4. Parathyroid hormone and Prolactin
When the stroke volume of the ventricles is much less than the expected values, the heart is said to be:
1. Fibrillating
2. Blocked
3. Arrested
4. Failing
All veins carry deoxygenated blood except
1. pulmonary vein
2. hepatic vein
3. hepatic portal vein
4. renal vein
During urine formation, the tubular cells secrete all the following into the filtrate except:
1.
2. Ammonia
3.
4.
The risk of the fetus developing hemolytic disease of the new born is present in:
1. any Rh+ fetus
2. second Rh- fetus of Rh+ mother
3. second Rh+ fetus of Rh- mother
4. Rh- mother
The figure shows a diagrammatic view of the human respiratory system with labels A, B, C, and D. Select the option that gives the correct identification, main function, and/or characteristics:
| 1. | B-pleural membrane- surrounds ribs on both sides to provide cushion against rubbing. |
| 2. | C-alveoli-thin walled vascular bag-like structures for the exchange of gases. |
| 3. | D-lower end of the lungs-diaphragm pulls it down during inspiration. |
| 4. | A trachea-long tube supported by complete cartilaginous rings for conducting inspired air. |
The total number of the phalanges in the human body are:
1. 14
2. 20
3. 32
4. 56
Under normal physiological conditions, when compared to pulmonary circulation:
1. the amount of blood circulated in systemic circulation is more
2. the amount of blood circulated in systemic circulation is less
3. the pressure of blood circulated in systemic circulation is more
4. the pressure of blood circulated in systemic circulation is less
Select the correct statement.
1. Expiration occurs due to external intercostal muscles.
2. Intrapulmonary pressure is lower than the atmospheric pressure during inspiration.
3. Inspiration occurs when atmospheric pressure is less than intrapulmonary pressure.
4. Expiration is initiated due to contraction of diaphragm.
Uric acid is the chief nitrogenous component of the excretory products of
1. man
2. earthworm
3. cockroach
4. frog
Select the correct matching of the type of the joint with the example in the human skeletal system
1. Cartilaginous joint - between frontal and parietal
2. Pivot joint - between third and fourth Cervical vertebrae
3. Hinge joint - between humerus and pectoral girdle
4. Gliding joint - between carpals
The contractile protein of skeletal muscle involving ATPase activity is
1. Tropomyosin
2. Myosin
3. α- Actinin
4. Troponin
Which of the following match is correct?
1. Emphysema : reduction of surface area of alveoli and bronchi
2. Pneumonia : occupational disease with asbestos
3. Silicosis : inflammation of alveoli
4. Asthma : excessive secretion of bronchial mucus
Assertion: The first and the second heart sounds are produced by the closure of AV and semilunar valves respectively.
Reason: The opening of the valves should not produce any sounds under normal physiological conditions.
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
A combination of carbon dioxide and hemoglobin, CO2HHb, being one of the forms in which carbon dioxide exists in the blood is the
1. oxyhemoglobin.
2. deoxyhemoglobin.
3. carboxyhemoglobin.
4. carbaminohemoglobin
The net filtration pressure in human kidney is estimated to be:
1. 60 mm Hg
2. 32 mm Hg
3. 18 mm Hg
4. 10 mm Hg
The endocrine gland located at the superior pole of kidney is:
1. spleen
2. pancreas
3. adrenal gland
4. testes
The basal metabolic rate of most of the cells in the human body is directly under the control of:
1. TSH
2. Adrenaline
3. Cortisol
4. Iodothyronines
The resting axonal membrane is:
| 1. | impermeable to the flux of both sodium and potassium ions |
| 2. | freely permeable to the flux of both sodium and potassium ions |
| 3. | relatively more permeable to the flux of potassium and nearly impermeable to the flux of sodium ions |
| 4. | relatively more permeable to the flux of sodium and nearly impermeable to the flux of potassium ions |
The human placenta has endocrine functions that does not secrete:
1. prolactin
2. estrogens
3. progesterones
4. human chorionic gonadotropin (HCG)
The middle ear:
1. is responsible for balancing the body.
2. is responsible for transmitting sound waves from the outer ear to the inner ear
3. contains the otolith organs
4. is a cavity in parietal bone.
Name a peptide hormone which acts mainly on hepatocytes, adipocytes and enhances cellular glucose uptake and utilisation.
1. Insulin
2. Glucagon
3. Secretin
4. Gastrin
Follicles are found in the ovaries and:
1. anterior pituitary
2. testis
3. thyroid
4. pancreas
The type of neuron seen in the retina of human eye are:
1. bipolar
2. unipolar
3. multipolar
4. sensory
Parts A, B, C and D of the human eye are shown in the diagram. Select the option which gives correct identification along with its functions/characteristics:
| 1. | B-blind spot has only a few rods and cones |
| 2. | C-aqueous chamber reflects the light which does not pass through the lens |
| 3. | D-choroid- its anterior part forms the ciliary body |
| 4. | A-retina - contains photoreceptors rods and cones |
