Test 25 (Class 11) - Type Bio SCAN (Old NCERT)Contact Number: 8527521718Test 25 (Class 11) - Type Bio SCAN (Old NCERT)Contact Number: 8527521718| 1. | secondary growth | 2. | disease resistance |
| 3. | reproduction | 4. | conserving water |
Which bag would you predict to show the least change in mass at the end of the experiment? 
1. The bag in Beaker 1
2. The bag in Beaker 2
3. The bag in Beaker 3
4. The bag in Beaker
Kranz anatomy is one of the characteristics of the leaves of:
1. Wheat
2. Sugarcane
3. Mustard
4. Potato
Substrate-level phosphorylation is one of the ways for the formation of ATP. In this process:
1. maximum ATP are produced in higher organisms
2. a high-energy phosphate group is transferred directly to ADP
3. chemiosmosis provides energy for phosphorylation
4. the protein ATP synthase works to add phosphate to ADP
A process that makes an important difference between C3 and C4 plants is:
1. Transpiration
2. Glycolysis
3. Photosynthesis
4. Photorespiration
In which one of the following do the two names refer to one and the same thing:
1. Kreb's cycle and Calvin cycle
2. Tricarboxylic acid cycle and citric acid cycle
3. Citric acid cycle and Calvin cycle
4. Tricarboxylic acid cycle and urea cycle
Which one of the following elements is not an essential micronutrient for plant growth?
1. Mn
2. Zn
3. Cu
4. Ca
Out of the following what is both used and produced during the glycolytic pathway?
I. ATP
II. ADP
III. Phosphate groups
IV. NADH
1. I, II and III only
2. I, II and IV only
3. I, III and IV only
4. I, II, III and IV
Carbon dioxide splits to form oxygen during:
1. photosynthesis.
2. respiration.
3. photorespiration.
4.None.
What shall be the water potential of a root hair cell absorbing water from the soil?
1. Zero
2. Less than zero
3. More than zero
4. Infinite
Which of the following elements helps in maintaining the structure of ribosomes?
1. Magnesium
2. Zinc
3. Copper
4. Molybdenum
The most abundant element present in the plant is:
1. Nitrogen
2. Manganese
3. Iron
4. Carbon
The primary electron acceptor of photosystem II in photosynthetic plants is:
1. Iron-sulfur protein
2. Plastoquinone
3. Plastocyanin
4. Pheophytin
What is not true regarding bulk transport in plants?
1. It is driven primarily by pressure potential.
2. It depends on a difference in pressure potential at the source and sink.
3. Substances in a solution or suspension move along their individual concentration gradients
4. It may be the result of either positive or negative pressure potential.
The oxygen evolved during photosynthesis comes from water molecules. Which one of the following pairs of elements are involved in this reaction?
1. Manganese and chlorine
2. Manganese and potassium
3. Magnesium and molybdenum
4. Magnesium and chlorine
Wilting of leaves causes decline in photosynthesis because:
1. chloroplasts in wilted leaves cannot photosynthesize.
2. accumulation in the leaves inhibits Calvin cycle enzymes.
3. of lack of water for photolysis.
4. closure of stomata prevents entry of entry into the leaf.
The function of leghemoglobin in the root nodules of legumes is:
1. oxygen removal
2. nodule differentiation
3. expression of nif gene
4. inhibition of nitrogenase activity
| 1. | vessels and tracheid differentiation |
| 2. | leaf abscission |
| 3. | annual plants |
| 4. | floral parts. |
The gall bladder in humans:
1. Secretes bile
2. Releases bile into hepatic duct
3. Stores and concentrates bile
4. Secretes some lipase
A plant has been forcibly put into a horizontal position. After some time, the tip of this plant grows:
1. upwards.
2. downwards.
3. straight horizontally.
4. unpredictably.
Unicellular glands lining the alimentary canal and secreting mucus are called as:
1. Goblet cells
2. Enterochromaffin cells
3. Paneth cells
4. Zymogen cells
Which one of the following pairs is not correctly matched?
| 1. | Abscisic acid - Stomatal closure |
| 2. | Gibberellic acid - Leaves fall |
| 3. | Cytokinin - Cell division |
| 4. | IAA - Cell wall elongation |
Muscularis layer in the wall of the alimentary canal is formed by smooth muscles usually
arranged into:
1. an inner circular and an outer longitudinal layer.
2. an inner longitudinal and an outer circular layer.
3. both circular layers
4. both longitudinal layers
What is the reason that a plant seedling bends toward sunlight?
| 1. | Migration of auxin to the lower part of the stem due to gravity. |
| 2. | Presence of more auxin on the light side of the stem. |
| 3. | Auxin is found in greatest abundance on the dark side of the stem. |
| 4. | Auxin is destroyed more quickly on the dark side of the stem. |
An accessory digestive gland amongst the following would be:
1. Pyloric glands
2. Crypts of Lieberkuhn
3. Salivary glands
4. Oxyntic glands
The neurotransmitter released at the neuro-muscular junction is:
1. Epinephrine
2. Acetylcholine
3. Serotonin
4. GABA
The atrium and the ventricle on the same side in the human heart are separated by:
1. a thin muscular wall
2. a thick muscular wall
3. a thin fibrous tissue
4. a thick fibrous tissue
Once released from the bone marrow into the circulation, the average life span of a red blood cell is about
1. 72 hours
2. one week
3. 4 months
4. 2 years
Presence of which of the following conditions in urine is indicative of Diabetes mellitus:
1. Uremia and Renal Calculi
2. Ketonuria and Glycosuria
3. Renal Calculi and Hyperglycaemia
4. Uremia and Ketonuria
What causes the opening of tricuspid and bicuspid valves?
1. Atrial pressure greater than pressure in the ventricles.
2. Ventricular pressure greater than pressure in the arteries.
3. Arterial pressure greater than pressure in the ventricles.
4. Ventricular pressure greater than pressure in the atria.
Select the correct events that occur during inspiration.
(a) Contraction of diaphragm
(b) Contraction of external inter-costal muscles
(c) Pulmonary volume decreases
(d) Intra pulmonary pressure increases
| 1. | (c) and (d) | 2. | (a), (b) and (d) |
| 3. | only (d) | 4. | (a) and (b) |
All the following shorten during muscle contraction except:
1. sarcomere
2. A bands
3. I bands
4. H bands
The correct statements amongst the following are:
| I: | Cardiac output is volume of blood pumped by each ventricle per minute |
| II: | All the four chambers of human heart are never in diastole together |
| III: | The first heart sound is associated with opening of atrioventricular valves |
| IV: | The pressure in pulmonary artery is equal to the pressure in aorta |
| 1. | Only I | 2. | Only I and IV |
| 3. | Only I and III | 4. | Only I, II and IV |
Increased asthmatic attacks in certain seasons are related to:
1. hot and humid environment
2. eating fruits preserved in tin containers
3. inhalation of seasonal pollen
4. low-temperature
Match the items in Column - I with those in Column - II:
| Column I | Column II | ||
| (a) | Podocytes | (i) | Crystallised oxalate |
| (b) | Protonephridia | (ii) | Annelids |
| (c) | Nephridia | (iii) | Amphioxus |
| (d) | Renal calculi | (iv) | Filtration slits |
| (a) | (b) | (c) | (d) | |
| 1. | (iii) | (iv) | (ii) | (i) |
| 2. | (iii) | (ii) | (iv) | (i) |
| 3. | (iv) | (iii) | (ii) | (i) |
| 4. | (iv) | (ii) | (iii) | (i) |
Which of the following types of synovial joints is not correctly matched with its location in the human body?
|
|
Type of joint |
Example |
|
1. |
Saddle |
Between metacarpals of the thumb |
|
2. |
Gliding |
Between carpal bones |
|
3. |
Pivot |
Between atlas and axis |
|
4. |
Hinge |
Knee joint |
The pubic bones, constituent of the coxal bone, are held together ventrally by a:
1. syndesmosis
2. diarthrotic
3. symphysis
4. synchondrosis
When you hold your breath, which of the following gas changes in blood would first lead to the urge to breathe?
1. Falling O2 concentration
2. Rising CO2 concentration
3. Falling CO2 concentration
4. Rising CO2 and falling O2 concentration
Interstitial fluid resembles plasma in the same distribution of:
1. Formed elements
2. Proteins
3. Minerals
4. Enzymes
All terrestrial vertebrates, except amphibians, breathe by expanding their lungs due to
1. negative pressure within the lungs
2. positive pressure within the lungs
3. neutral pressure within the lungs
4. countercurrent pressure within the lungs
The principal nitrogenous excretory compound in humans is synthesised:
1. in kidneys but eliminated mostly through liver
2. in kidneys as well as eliminated by kidneys
3. in liver and also eliminated by the same through bile
4. in the liver, but eliminated mostly through kidneys
Which of the following factors is responsible for the formation of concentrated urine?
| 1. | Hydrostatic pressure during glomerular filtration. |
| 2. | Low levels of antidiuretic hormone. |
| 3. | Maintaining hyperosmolarity towards inner medullary interstitium in the kidneys. |
| 4. | Secretion of erythropoietin by Juxtaglomerular complex. |
Which of the following hormones does not act through a second messenger?
1. Adrenocorticotropin
2. Insulin
3. Thyrocalcitonin
4. Triiodothyronine
Olfactory bulbs are the extension of the human brain’s:
1. Reticular formation
2. Corpora quadrigemina
3. Telencephalon
4. Limbic system
Which of the following match is correct
| Hormone | Effect |
| 1. Oxytocin | Milk ejection hormone |
| 2. Glucagon | Decreases blood sugar level |
| 3. Adrenaline | Decreases heart rate |
| 4. Thyroxine | Decreases BMR |
Which one of the following does not act as a neurotransmitter?
1. Acetylcholine
2. Epinephrine
3. Norepinephrine
4. Cortisone
Exophthalmic goiter is seen in:
1. Iodine deficiency
2. Hashimoto’s disease
3. Myxedema
4. Graves’ disease
In human adult females, oxytocin
1. is secreted by anterior pituitary
2. Stimulates growth of mammary glands
3. Stimulates pituitary to secrete vasopressin
4. causes strong uterine contractions during parturition
The ear ossicle, stapes, transmits vibrations from incus to the:
1. malleus
2. tympanic membrane
3. oval window
4. round window
Identify the incorrect statement regarding the human eye:
1. The diameter of the pupil is regulated by the muscle fibers of the iris
2. Scotopic vision is the function of rods
3. When all cones are stimulated equally, a person would see the white color
4. Light induces an association of opsin and retinal forming visual purple