Test 20 (Class 11) - Type Bio SCAN (Old NCERT)Contact Number: 8527521718Test 20 (Class 11) - Type Bio SCAN (Old NCERT)Contact Number: 8527521718In photosynthesis, the light-independent reactions take place at?
1. Thylakoid lumen
2. photosystem I
3. photosystem II
4. Stromal matrix
Water potential is best defined as the:
1. product of turgor pressure and pressure potential
2. difference between pressure potential and osmotic potential
3. combination of pressure potential and solute potential
4. difference between pressure potential and osmotic potential
Cyclic -photophosphorylation results in the formation of:
1. NADPH
2. ATP and NADPH
3. ATP, NADPH, and O2
4. ATP
In aerobic cellular respiration, maximum number of ATP molecules is produced during?
1. Glycolysis
2. Oxidation of pyruvate
3. Kreb’s cycle
4. Chemiosmosis
Which of the following is not a C3 plant?
1. Rice
2. Wheat
3. Maize
4. Potato
All enzymes of the TCA cycle are located in the mitochondrial matrix except one which is located in inner mitochondrial membranes in eukaryotes and in the cytosol in prokaryotes. This enzyme is:
| 1. | lactate dehydrogenase | 2. | isocitrate dehydrogenase |
| 3. | malate dehydrogenase | 4. | succinate dehydrogenase |
Match each item in Column I with one in Column II and select the best match from the codes given:
|
|
Group of minerals |
|
Deficiency symptoms in plants |
|
A |
N, K, Mg, S, Fe, Zn, Mo |
P |
Necrosis of leaf tissue |
|
B |
Ca, Mg, Cu, K |
Q |
Delay in flowering |
|
C |
N, K, S, Mo |
R |
Chlorosis |
|
D |
N, S, Mo |
S |
Inhibition of cell division |
Codes:
|
|
A |
B |
C |
D |
|
1. |
P |
Q |
R |
S |
|
2. |
P |
R |
Q |
S |
|
3. |
R |
P |
S |
Q |
|
4. |
R |
P |
Q |
S |
Respiratory Quotient (RQ) value of tripalmitin is:
1. 0.09
2. 0.9
3. 0.7
4. 0.007
In the leaves of -plants, malic acid synthesis during fixation occurs in
1. epidermal cells
2. mesophyll cells
3. bundle sheath
4. guard cells
Both simple diffusion and facilitated diffusion:
1. require special membrane proteins
2. are highly selective in nature
3. do not require ATP energy
4. are uphill transports
Best defined function of manganese in green plants is :
1. Photolysis of water
2. Calvin cycle
3. Nitrogen fixation
4. Water absorption
1. convert free nitrogen to nitrogen compounds
2. convert proteins into ammonia
3. reduce nitrates to free nitrogen
4. oxidize ammonia to nitrates
| Assertion(A): | For every three molecules of \(CO_2\) that enter the Calvin cycle, six molecules of G3P are formed but only one molecule of G3P can be counted as a net gain. |
| Reason(R): | The rest are required to complete the cycle. |
| 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 |
A plant treated with a fungicide may develop:
1. Loss of root hair
2. Inhibition of transport proteins in root cells
3. Deficiency of mineral
4. Formation of root knots
If the chloroplasts are illuminated by sunlight, where do you expect to find the pH to be lowest?
| 1. | Stroma |
| 2. | Intermembrane space [between outer and inner membranes] |
| 3. | Space enclosed by thylakoid membranes |
| 4. | Cytosol |
Which of the cell would be called as ‘flaccid’?
1. A
2. B
3. C
4. A and B
Nitrogen fixing nodules on the roots of actinorhhizal [non-leguminous] plants is produced during biological nitrogen fixation by:
1. Rhizobium
2. Rhodospirillum
3. Frankia
4. Anabaena
Match the following concerning the activity/function and the phytohormone involved:
| Column I | Column II | ||
| (a) | Fruit ripener | (i) | Abscisic acid |
| (b) | Herbicide | (ii) | GA 3 |
| (c) | Bolting agent | (iii) | 2, 4-D |
| (d) | Stress hormone | (iv) | Ethephon |
Select the correct option from following:
| Options: | (a) | (b) | (c) | (d) |
| 1. | (ii) | (iii) | (iv) | (i) |
| 2. | (iii) | (iv) | (ii) | (i) |
| 3. | (iv) | (iii) | (ii) | (i) |
| 4. | (iv) | (ii) | (i) | (iii) |
Vomiting is a reflex controlled by a vomiting center located in:
1. The Broca’s area of the cerebral cortex
2. Hypothalamus
3. Pons Varolii
4. Medulla oblongata
Biennial plants:
I. are monocarpic
II. include wheat, corn and mustard
III. can be stimulated to a photoperiodic flowering response by a cold treatment
1. Only I and II are correct
2. Only I and III are correct
3. II and III are correct
4. I, II and III are correct
Marasmus is characterized by all the following except:
1. Inadequate energy intake in all forms including protein
2. Earlier age of onset than kwashiorkor
3. Edema and ascites
4. Muscular wasting and loss of subcutaneous fat
Seed dormancy is due to:
| 1. | Ethylene | 2. | Abscisic acid |
| 3. | IAA | 4. | Starch |
Lipases can be activated by:
1. HCl
2. Secretions of Brunner’s glands
3. Bile
4. Cholecystokinin
One of the synthetic auxin is:
1. NAA
2. IAA
3. GA
4. IBA
The part of the small intestine where maximum absorption takes place is lined by:
1. Squamous epithelium
2. Cuboidal brush bordered epithelium
3. Columnar brush bordered epithelium
4. Transitional epithelium
Calcium, vital for muscle contraction, is stored in:
1. transverse tubules
2. myosin head
3. myofibrils
4. sarcoplasmic reticulum
Given below are four statements (a-d) regarding human blood circulatory system:
| (a) | Arteries are thick-walled and have narrow lumen as compared to veins |
| (b) | Angina is acute chest pain when the blood circulation to the brain is reduced |
| (c) | Persons with blood group AB can donate blood to any person with any blood group under ABO system |
| (d) | Calcium ions play a very important role in blood clotting |
Which two of the above statements are correct?
1. (a) and (b)
2. (b) and (c)
3. (c) and (d)
4. (a) and (d)
The colloid osmotic pressure in the blood is mainly due to:
1. albumin
2. glucose
3. RBCs
4. globulins
Vasoconstriction can be brought about by:
I. ADH
II. Angiotensin
III. ANF
1. Only II
2. Only I and II
3. Only I
4. I, II, and III
The lymph eventually enters the circulation by draining into two specific ___________.
1. arteries
2. arterioles
3. capillaries
4. veins
Select the favorable conditions required for the formation of oxyhemoglobin at the alveoli.
1. High pO2, high pCO2, less H+, higher temperature
2. Low pO2, low pCO2, more H+, higher temperature
3. High pO2, low pCO2, less H+, lower temperature
4. Low pO2 high pCO2 more H+, higher temperature
The number of phalanges in thumb is/are:
1. 1
2. 2
3. 3
4. 4
The haemoglobin content per 100 ml of blood of a normal healthy human adult is:
1. 25-30 g
2. 17-20g
3. 12-16 g
4. 5-11
Pulmonary fibrosis is the feature of all cases of:
1. Occupational respiratory disorders
2. Emphysema
3. Pneumonia
4. Bronchial asthma
Match the incorrectly matched pair:
|
Nitrogenous waste/ Excretory organ |
Animal |
|
|
1. |
Ammonia |
Aquatic insects |
|
2. |
Uric acid |
Land snails |
|
3. |
Protonephridia |
Urochordate-Amphioxus |
|
4. |
Antennal glands |
Prawns |
All the following shorten during muscle contraction except:
1. sarcomere
2. A bands
3. I bands
4. H bands
Sliding filament theory can be best explained as:
| 1. | when myofilaments slide past each other, actin filaments shorten while myosin filament does not shorten |
| 2. | actin and myosin filaments shorten and slide past each other |
| 3. | actin and myosin filaments do not shorten but rather slide pass each other |
| 4. | when myofilaments slide past each other, myosin filaments shorten while actin filaments do not shorten |
Chemosensitive area of respiratory centre medulla is affected by
1. less and ions
2. less and ions
3. excess and H+ ions
4. excess and H+ ions.
What would be the heart rate of a person if the cardiac output is 5L, blood volume in the ventricles at the end of diastole is 100 mL and at the end of ventricular systole is 50 mL?
| 1. | 125 beats per minute | 2. | 50 beats per minute |
| 3. | 75 beats per minute | 4. | 100 beats per minute |
Name the chronic respiratory disorder caused mainly by cigarette smoking
1. asthma
2. respiratory acidosis
3. respiratory alkalosis
4. emphysema
If the cardiac output is about 6L/min, the renal blood flow/min would be about:
1. 180 L
2. 1200 ml
3. 500 ml
4. 700 ml
The proximal convoluted tubule of the nephron reabsorbs about what fraction of the filtrate?
1. 99%.
2. 85%.
3. 65%.
4. 19%.
Melatonin is secreted by:
1. Pineal gland
2. Skin
3. Pituitary Gland
4. Thyroid
A canal called the cerebral aqueduct passes through the:
1. Forebrain
2. Midbrain
3. Hindbrain
4. Spinal cord
1. Parathyroid and adrenal
2. Pancreas and parathyroid
3. Thymus and testes
4. Adrenal and ovary
Photosensitive compound in human eye is made up of
1. Opsin and Retinal
2. Opsin and Retinol
3. Transducin and Retinene
4. Guanosine and Retinol
Feeling the tremors of an earthquake, a scared resident of the seventh floor of a multi-storey building starts climbing down the stairs rapidly. Which hormone initiated this act?
1. Thyroxine
2. Adrenaline
3. Glucagon
4. Gastrin
Which one of the following pairs of hormones are the examples of those that can easily pass through the cell membrane of the target cell and bind to a receptor inside it (mostly in the nucleus)?
1. Insulin and glucagon
2. Thyroxin and insulin
3. Somatosatin and oxytocin
4. Cortisol and testosterone
The sensory organ of hearing and the receptors are located in:
1. scala vestibuli
2. semicircular canal
3. scala tympani
4. cochlear duct
The olfactory bulb in the human brain:
1. is an extension of the limbic system
2. is a part of the olfactory membrane
3. forms an important part of the mesencephalon
4. is located near the Wernicke’s area in the temporal cortex