Test 10 (Class 11) - Type Bio SCAN (Old NCERT)Contact Number: 8527521718Test 10 (Class 11) - Type Bio SCAN (Old NCERT)Contact Number: 8527521718Consider the two given statements:
I. Glycolysis is thought to be one of the most ancient of metabolic processes.
II. Glycolysis neither uses nor needs O2.
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. I is correct but II is incorrect
4. Both I and II are incorrect
Root hair cells have pumps that:
1. establish ATP gradients
2. acquire minerals from the soil
3. pressurize xylem transport
4. eliminate excess electrons
The overall goal of glycolysis, the Krebs cycle, and the electron transport system is the formation of:
1. ATP in small stepwise units.
2. ATP in one large oxidation reaction
3. Sugars
4. Nucleic acids
A plant, regarded as a short-day plant will flower only when:
1. days are shorter than nights.
2. days are shorter than a certain critical value.
3. nights are shorter than a certain critical value.
4. nights are longer than a certain critical value.
In the fermentation pathway ATP made are generated by:
1. the electron transport chain
2. substrate-level phosphorylation
3. chemiosmosis
4. ATP cannot be formed in this pathway
Name the plant growth regulator which upon spraying on sugarcane crop, increases the length of stem, thus increasing the yield of sugarcane crop.
1. Gibberellin
2. Ethylene
3. Abscisic acid
4. Cytokinin
Nitrogen fixing bacteria live in the nodules in a plant root. These nodules are formed by the cells of:
1. Epidermis
2. Cortex
3. Endodermis
4. Vascular cylinder
The opening of floral buds into flowers is a type of:
1. autonomic movement of locomotion
2. autonomic movement of variation
3. paratonic movement of growth
4. autonomic movement of growth
| Assertion: | CAM is an adaptation for increased efficiency in the use of water, and so is typically found in plants growing in arid conditions. |
| Reason: | The most important benefit of CAM to the plant is the ability to leave most leaf stomata open during the day. |
| 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 |
Identify the incorrect statement:
1. The water potential of pure water at standard temperature, which is not under any pressure, is taken to be zero.
2. Adding solute to pure water reduces its water potential.
3. The more the solute molecules, the lower [more negative] is the solute potential.
4. If a pressure greater than atmospheric pressure is applied to pure water or a solution, its water potential decreases.
Which one of the following is not an essential mineral element for plants while the remaining three are?
1. Phosphorus
2. Iron
3. Manganese
4. Cadmium
| Assertion(A): | The electrons of NADPH are more readily available for the reactions of Calvin cycle than those of water. |
| Reason(R): | Two electrons are required for the reduction of NADP+ to NADPH. |
| 1. | Both (A) and (R) are True and (R) is the correct explanation of (A). |
| 2. | Both (A) and (R) are True but (R) is not the correct explanation of (A). |
| 3. | (A) is True but (R) is False. |
| 4. | Both (A) and (R) are False |
Where are the carriers of the electrons located in a chloroplast?
| 1. | within thylakoid membranes |
| 2. | in the intra thylakoid space |
| 3. | within the inner membrane |
| 4. | in the intermembrane space [between outer and inner membrane] |
Based on your knowledge about root pressure given in section 11.3.2.1 , NCERT, can you think which of the following will play the most important role in development?
1. Epidermal hair
2. Endodermis
3. Cortex cells
4. Pericycle
The correct sequential involvement of organelles in the photorespiratory pathway is:
| 1. | Chloroplast → Peroxisome → Mitochondria |
| 2. | Chloroplast → Mitochondria → Peroxisome |
| 3. | Mitochondria → Chloroplast → Peroxisome |
| 4. | Mitochondria → Peroxisome → Chloroplast |
Wooden doors swell up and get stuck during the rainy season. This is due to the phenomenon of
1. imbibition
2. endosmosis
3. capillarity
4. deplasmolysis.
Pollen germination and carbohydrate translocation in plants is the function of:
1. Boron
2. Zinc
3. Chlorine
4. Molybdenum
The most common cause of diarrhea in young children is:
1. Escherichia coli
2. Rotavirus
3. Entamoeba histolytica
4. Salmonella typhi
All the following leukocytes have phagocytic properties except:
1. monocyte
2. lymphocyte
3. neutrophil
4. eosinophil
Exponential growth is shown by:
1. Unicellular forms
2. A cell in tissue culture
3. Embryo
4. Multicellular plants
The period that extends from the onset of atrial depolarization until the onset of ventricular depolarization is shown in an ECG as:
1. QRS complex
2. S-T interval
3. P-Q interval
4. QRS-T interval
Which one of the following is a fat-soluble vitamin and its related deficiency disease?
1. Ascorbic acid - Scurvy
2. Retinol - Xerophthalmia
3. Cobalamine - Beri-Beri
4. Calciferol - Pellagra
Assertion: Antibiotics have no role to play in the management and treatment of a vast majority of cases of gastric ulcers.
Reason: Most gastric ulcers are known to be caused by psychological stress and resulting excess acid secretion.
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
Pancreatic secretions can be prevented from entering the duodenum by:
1. pyloric valve
2. sphincter of oddi
3. the common bile duct
4. cholecystokinin secretion
Consider the following statements:
I. The common bile duct is guarded by the sphincter of Oddi.
II. Lower esophageal sphincter is also called as the cardiac sphincter.
III. The external anal sphincter is under our voluntary control.
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
Which of the following pesticides is an acetylcholinesterase inhibitor?
1. Aldrin
2. BHC
3. Endosulfan
4. Malathion
Consider the following statements:
I. The DCTs of many nephrons open into the collecting duct.
II. In cortical nephrons, loop of Henle is short and does not extend into medulla.
III. Vasa recta is absent or highly reduced in cortical nephrons.
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 reabsorption of chloride ions in the renal tubules if determined by:
1. rate of potassium reabsorption
2. rate of sodium reabsorption
3. rate of potassium secretion
4. rate of phosphate reabsorption
| Column-I | Column-II | ||
| (a) | Gliding joint | (i) | Between carpal and metacarpal of thumb |
| (b) | Hinge joint | (ii) | Between Atlas and Axis |
| (c) | Pivot joint | (iii) | Between the Carpals |
| (d) | Saddle joint | iv | Between Humerus and Ulna |
Select the correct option from the following:
1. (a)-(iii), (b)-(iv), (c)-(ii), (d)-(i)
2. (a)-(iv), (b)-(i), (c)-(ii), (d)-(iii)
3. (a)-(iv), (b(-(ii), (c)-(iii), (d)-(i)
4. (a)-(i), (b)-(iii), (c)-(ii), (d)-(iv)
The water produced as an end product of the oxidation of energy-containing molecules such as carbohydrates, fats and proteins is called as:
1. cutaneous water.
2. metabolic water.
3. transcellular water.
4. free water.
The diagram given here is the standard ECG of a normal person. The P-wave represents the
1. contraction of both the atria
2. initiation of the ventricular contraction
3. beginning of the systole
4. end of the systole
In the internal ear, perilymph is found in the:
1. utriculus
2. semicircular canals
3. scala media
4. scala vestibuli
Failure of a thick segment of the ascending limb of the loop of Henle will adversely affect:
1. Ability of the nephron to secrete toxins into the urine
2. Dilution of the urine if needed
3. Conservation of water in case of dehydration
4. The acid-base balance in the blood
An intravascular clot and its fragments are respectively called as:
1. hematoma; thrombosis
2. thrombus; hematoma
3. thrombus; embolus
4. embolus; thrombus
Which of the following pair (of structure matched with their description) is correct?
|
Structure |
Description |
|
|
1. |
Cartilage and cornea |
No blood supply but do require oxygen for respiratory need |
|
2. |
Shoulder joint and elbow joint |
Balls and socket type of joint |
|
3. |
Premolars and molars |
20 in all and 3-rooted |
|
4. |
Tibia and fibula |
Both form parts of the knee joint |
The seat of the origin of the vagus nerve is:
1. red nucleus of the midbrain
2. epithalamus
3. pons
4. medulla oblongata
Third ventricle lies in
1. Medulla oblongata
2. Midbrain
3. Diencephalon
4. Cerebrum
A slower heart rate or bradycardia would most likely be the result of:
1. ectopic action potentials in the atria
2. damage to the tricuspid valve
3. excessive sympathetic stimulation
4. excessive parasympathetic stimulation
Which one of the following statements is correct with respect to salt water balance inside the body of living organisms?
1. When water is not available, camels do not produce urine but store urea in tissues.
2. Salmon fish excretes lot of stored salt through gill membrane when in fresh water.
3. Paramecium discharges concentrated salt solution by contractile vacuoles.
4. The body fluids of fresh water animals are generally hypotonic to surrounding water.
Blood pressure is the pressure of blood against:
1. the left ventricle
2. the tissue of the organs
3. the capillaries of the lung
4. the wall of a blood vessel
In the given diagram of the lower limb bones of a human, a sesamoid bone is depicted by the letter:
1. A
2. B
3. C
4. D
To form a cross-bridge between the myosin head and the active sites on the actin filament, all the following must happen except:
1. ATP hydrolysis
2. Release of calcium from the sarcoplasmic reticulum
3. Generation of the action potential in the sarcolemma
4. End of the action of acetylcholine by acetylcholinesterase
Most carbon dioxide in human blood is transported as:
1. Bicarbonate ions
2. Carbaminohemoglobin
3. Carboxyhemoglobin
4. Dissolved in plasma
An oversecretion of growth hormone in human adults can cause:
1. Cushing’s disease
2. Conn’s syndrome
3. Acromegaly
4. Addison’s disease
A patient of emphysema is unlikely to have:
1. An increase in carbon dioxide levels in blood
2. A decrease in oxygen levels in the blood
3. An increase in RBC count
4. A decrease in breathing rate
Which one of the following four glands is correctly matched with the accompanying description?
1. Thyroid - hyperactivity in young children causes cretinism
2. Thymus - starts undergoing atrophy after puberty
3. Parathyroid - secrets parathormone which promotes movement of calcium ions from blood into bones during calcification
4. Pancreas - Delta cells of the Islets of Langerhans secrete a hormone which stimulates glycolysis
Damage to alveolar walls leading to decrease in respiratory surface is characteristic of:
1. Asthma
2. Pneumoconiosis
3. Emphysema
4. Pneumonitis
Which of the following is one of the physiological adaptations that occur in the human body at very high altitudes?
1. The kidney releases EPO to stimulate an increase in hematocrit.
2. The heart rate decreases.
3. Because of a lower , the respiratory rate declines.
4. The percentage of hemoglobin saturation increases.
Oxytocin and ADH are synthesized:
1. in neurosecretory cells that originate in the hypothalamus
2. in the posterior pituitary
3. in the hypothalamic-hypophyseal portal system
4. in the pineal
Glucagon is antagonistic to insulin in the regulation of blood glucose levels. It means it does not:
1. promote glycogenolysis
2. stimulate gluconeogenesis
3. retard the uptake of glucose by body cells
4. promote utilization of glucose by body cells for ATP formation
