22339 + Interview Questions in Biology in Class 11 Page 321 InterviewSolution

16001.	Question : The lon involved in stomatal movement is:
Answer» ANSWER :1

Discussion

16002.	Question : Juxtagomeruclar cells of renal cortex synthesize a hormone called(a) ADH(b) oxytocin(c) renin(d) urochrome
Answer» ADH oxytocin renin urochrome

Discussion

16003.	Question : Juxtaglomerular cells of renal cortex synthesize a hormone called .........
Answer» ADH OXYTOCIN RENIN Urochrom SOLUTION : Oxytocin

Discussion

16004.	Question : Juxta glomerular cells of renal cortex synthesize a hormone called :
Answer» ADH Oxytocin Renin Urochrome Answer :C

Discussion

16005.	Question : Juxta glomerular apparatus (JGA) comprises of all of the following except:
Answer» MACOLA densa cells JUXTA GLOMERULAR cells Lacis cells Principal cells Answer :D

Discussion

16006.	Question : Jute is obtained from the secondary phloem of
Answer» LINUM usitatissimum Boehmeria NIVEA MUSA textilis Corchorus capsularis Answer :D

Discussion

16007.	Question : Jute, Flax, Hemp fibres are morphologically
Answer» PERICYCLIC FIBRES XYLEM fibres Phloem fibres Medullary fibres Answer :C

Discussion

16008.	Question : Justify the role of RUBISCO enzyme which acts as Carboxylase and Oxygenase?
Answer» SOLUTION :RUBISCO - RUBP carboxylase oxygenase enzyme is the most ABUNDANT protein found on the earth and forms 16% of chloroplast protein. It acts as carboxylase in the PRESENCE of `CO_(2)` and in the absence of `CO_(2)`, it FUNCTIONS as oxygenase. 1. In `C_(

Discussion

16009.	Question : Justify the following statements on the basis of external features : (i)Underground parts of a plant are not always roots . (ii) Flower is a modified shoot.
Answer» SOLUTION : (i)Some plants like potato , elephant.s FOOT, ginger, turmeric, colocasia are stems in reality but its part remains underground and gains various shape by storing food. Thus other than root, stems are also underground Similarly stem is underground in onion and garlie and their scaly LEAVES store food and become fleshy. (ii) Flower is a modified shoot meant for sexual reproduction. The different parts of flower like stalk, sepals, petals , stamen and carpel, elements are modifications of stem. They modify and get different shape and FORM a flower.

Discussion

16010.	Question : Justify the following statement on the basis of externalfeatures : "Underground parts of a plant are not always roots."
Answer» Solution :Underground parts of a PLANT are sometimes modifications of the stem. Such STEMS grow underground and store material due to which they become QUITE thick and fleshy. They are SPECIALLY adapted for perennation to tide over the unfavourable season. As they grow underground, they are often mistaken for roots. But, they can be readily distinguished from roots by the presence of (i) nodes and INTERNODES, (ii) scale leaves at the nodes,and (iii) axillary and terminal buds.

Discussion

16011.	Question : Justify the statement on the basis of external features that the flower is a modified shoot.
Answer» SOLUTION :FLOWER is a MODIFIED SHOOT.

Discussion

16012.	Question : Justify the following statement on the basis of externalfeatures : Flower is a modified shoot.
Answer» Solution :The FLOWER is a modified shoot, meant for sexual REPRODUCTION. The flowering shoot is highly compressed and is divided into NODES and internodes like an ORDINARY vegetative shoot. The nodes bear FLORAL leaves-sepals, petals, stamens and carpels, arranged in anacropetal manner like vegetative leaves.

Discussion

16013.	Question : Justify plant cell as an osmotic system.
Answer» SOLUTION :1. A plant cell is bound by cell membrane which is semi PERMEABLE which is a requisite for OSMOSIS. 2. The vacuole present in the plant cell has SAP which contributes to solute potential. 3. Hence plant cell is a OSMOTIC system.

Discussion

16014.	Question : Just as HCI is for the pepsinogen, so is the(a) bile juice for fats(b) glucagon for glucose(c) haemoglobin to oxygen(d) enterokinase for trypsinogen
Answer» bile juice for fats GLUCAGON for glucose HAEMOGLOBIN to oxygen enterokinase for TRYPSINOGEN SOLUTION :enterokinase for trypsinogen

Discussion

16015.	Question : Junctions that help to stop substancs from leaking across a tissue.
Answer» SOLUTION :TIGHT JUNCTIONS

Discussion

16016.	Question : Junctions that facilitate the cells to communicate by connecting they cytoplasm of adjoining cells .
Answer» SOLUTION :GAP JUNCTIONS

Discussion

16017.	Question : Junction between two neurons is called a _______while the junction between a neuron and a muscle fibre is called a _______
Answer» ANSWER :SYNAPSE ; MOTOR END PLATE

Discussion

16018.	Question : Jointed legs, exoskeleton of chitin, haemocoel.
Answer» SOLUTION :ARTHROPODE

Discussion

16019.	Question : Joint of sternum and ribs is ......
Answer» FIBROUS JOINT Angular joint Hinge joint Cartilaginous Solution :Fibrous joint

Discussion

16020.	Question : Joint of femur with pelvic girdle is
Answer» BALL and socket pivot joint saddle HINGE

Discussion

16021.	Question : Joint between metacarpals and phalanges is .............
Answer» BALL and SOCKET PIVOT Saddle HINGE Solution :Hinge

Discussion

16022.	Question : Name of the joint present between the atlas and axis is
Answer» PIVOT Hinge Angular Saddle Solution : Pivot

Discussion

16023.	Question : Johnston's organ is present in ……………… .
Answer» ANTENNA of INSECT head of COCKROACH abdomen of housefly abdomen of SPIDER Solution :antenna of insect

Discussion

16024.	Question : JNOTAXA is an e-Taxonomic resource useful for
Answer» Studying ELECTRON MICROSCOPIC IMAGES to study molecular structures of cell organelles. DIGITAL images and DESCRIPTION about the species. Studying behaviour of organisms Identifying digital resources of animals. Answer :B

Discussion

16025.	Question : JMV stands for ………………. .
Answer» Juxta MEDULLARY nephrons Juxta MEMORY nephrons Juxta medullary neuron Juxta memory neuron Answer :A

Discussion

16026.	Question : Jersy is a__________breed.
Answer» MILCH DROUGHT PURPOSE DUAL purpose Common Solution :Milch

Discussion

16027.	Question : Jelly fish is coelenteron/ctenophora
Answer» SOLUTION :COELENTERON

Discussion

16028.	Question : Jawless mouth, slimy skin without scales, 2-chambered heart.
Answer» SOLUTION :CYCLOSTOMATA

Discussion

16029.	Question : Jaw suspension characteristic of mammals is
Answer» Amphistylic Craniostylic Autodiastylic Hyostylic Answer :B

Discussion

16030.	Question : Jaundice is a disease of…………. .
Answer» Kidney Liver PANCREAS DUODENUM SOLUTION :N/A

Discussion

16031.	Question : Jamming of wooden doors and windows takes place during rainy season. Give reason
Answer» SOLUTION : During rainy season, wooden doors and windows quickly ABSORB water from the atmosphere and swells up considerably. This swelling up as a result of absorption of water is CALLED imbibition. Hence, jamming of wooden doors and windows takes place during rainy season.

Discussion

16032.	Question : Jack fruit is an example for ...............
Answer» syconus siliqua SOROSIS nut SOLUTION :sorosis

Discussion

16033.	Question : It is the practice of mating of the animals of same breed, having no common ancestors on either side of their pedigree up to 4 to 6 generations
Answer» Out crossing Cross breeding In breeding Interspecific hybridisation Answer :A

Discussion

16034.	Question : It is said that the one cycle of cell division in human cells (eukaryotic cell) takes 24 hours. Which phase of the cycle, do you think occupies the maximum part of cell cycle ?
Answer» SOLUTION :INTERPHASE

Discussion

16035.	Question :It is said that the one cycle of cell division in human cells (eukaryotic cells) takes 24 hours. Which phase of the cycle, do you think occupies the maximum part of cell cycle ?
Answer» SOLUTION :The cell division span of Eukaryotic cell is 24 HOURS. During interphase, cell takes 95% of time.

Discussion

16036.	Question : It is said that elemental composition of living organisms and that of inanimate objects (like earth's crust) are similar in the sense that all the major elements are present in both. Then what would be the difference between these two groups ? Choose a correct answer from among the following. (A) Living organisms have more gold in them than inanimate objects. (B) Living organisms have more water in their body than inanimate objects. (C) Living organisms have more carbon, oxygen and hydrogen per unit mass than inanimate objects. (D) Living organisms have more calcium in them than inanimate objects.
Answer» Living ORGANISMS have more gold in them than inanimate objects. Living organisms have more water in their BODY than inanimate objects. Living organisms have more CARBON, oxygen and HYDROGEN per unit mass than inanimate objects. Living organisms have more CALCIUM in them than inanimate objects. Answer :C

Discussion

16037.	Question : It is observed that deficiency of a particular element showed its symptoms initially in older leaves and then in younger leaves. (a) Does it indicate that the element is actively mobilized or relatively immobile? (b) Name two elements which are highly mobile and two which are relatively immobile. ( c) How is the aspect of mobility of elements important to horticulture and agriculture.
Answer» Solution :(a) Plant TRIES to send mineral elements into mature leaves. In comparison to older leaves when element mobilizes the the effect of its deficiency is first SEEN on older leaves. Because particular mineral element first reaches to the top of the tree. So lower leaves can not obtain it. (b) P, K and Mn are more MOBILIZED elements while `Ca^(+++) and K^+` are less mobilized elements. ( c) Important of mobilized mineral element in agriculture and Horticulture. (i) The crop. in which productivity is obtained from older leaves, its economic VALUE is decreases (ii) The crop is which flowers fruits and FLORESCENCE are not produced there immobilized elements don.t reach till top. So they decrease yield.

Discussion

16038.	Question :it is observed that heart, cells do not exhibit cell division. Such cells do not divide further and exit ………………………………. phase to enter an inactive stage called ………………………. of cell cycle.
Answer» SOLUTION :`G_1,G_0`

Discussion

16039.	Question :It is observed that heart cells do not exhibit cell division. Such cells do not divide further and exit ......... phase to enter an inactive stage called .......... of cell cycle. Fill in the blanks.
Answer» SOLUTION :`G_1,G_0`

Discussion

16040.	Question : It isnecessary to send /deliverblood from rightventricleto lungs.
Answer» SOLUTION :Deoxygenated impureblood comes to rightventricle from supervena CAVA. This bloodis SUPPLIEDTO lumgs through pulmonaryarteries . It RECEIVES `O_(2)`and becomes pure . Soblood REACHES to vencticlefrom rightatriumthroughpulmonarytransport .

Discussion

16041.	Question : It is necessary that Calvin cycle runs for six times.
Answer» Solution :ATP and NADPH produced at the end of light reaction are used in BIOSYNTHETIC phase. `CO_(2)` COMBINES with molecule RuBP and forms PGA. If this cycle runs for SIX times, 6 molecules of RuBP combine with `6CO_(2)`, form 12 molecules of PGAL in reduction out of that two molecules of PGAL are used for making a molecule of glucose and remaining 10 molecules of PGAL form 6 RuBP again by regeneration. THUS cycle continues, during that `CO_(2)` is obtained from atmosphere and glucose is formed at the end.

Discussion

16042.	Question : It is known that some varieties of wheat are sown in autumn but are harvested around next mid summer. (A) What could be the probable reason for this? (B) What term is used for this promotion of lowering under low temperature ? (C) Which plant hormone can replace the cold treatment?
Answer» Solution :(A) Annual winter wheat plants take one year full growing season for the completion of their vegetative growth period and then initiate flowers and fruits. This is because after they form seedlings in autumn, they receive low temperature throughout winter, which enables them to reach vegetative maturity. They resume growth in spring and bear flowers and grains towards mid summer. (B) The chilling or cold treatment of seeds to reduce FLOWERING is called vernalisation. It is a process of shortening of the juvenile or vegetative phase and hastening flowering by a previous cold treatment. This STIMULUS of vernalisation is perceived only by the meristematic cells. E.g., shoot TIP, embryo tip, root apex, developing leaves, etc. (C) GA or gibberellic acid treatment can replace cold treatment and can INDUCE flowering early by reducing vegetative growth period in many long day plants.

Discussion

16043.	Question : It is knownthatred musclefibres in animalscan work for longer periods of time continuously . Howis thispossible ?
Answer» Solution :Generally MUSCLES are of two types : (1) Red muscle (2) White muscle. Red muscles can work for longer period because. (i)Theyred Haemoglobin named Myoglobin so they appear red coloured. Myoglobin accepts oxygen and stores in the form of oxymyoglobin. Oxymayoglobinrelease `O_(2)` during muscle contraction. (ii) THEYHAVE more mitochondria. So they can work till longer period . (iii) They have LESS myofibrilsnetwork. (iv) They can do AEROBIC respiration for longer period withoutstoringlactic acid. So withouttiring red muscles can contract for longer period . (v) The rate of contraction is LOW for longer period. eg. back muscles in humans.

Discussion

16044.	Question :It is important that the centromere does not divide until the end of metaphase because it (a) contains the genes that control prophase(b) holds the replicated DNA molecules together(c) is connected to the nuclear membrane(d) produces the spindle fibres
Answer» CONTAINS the genes that control prophase holds the REPLICATED DNA MOLECULES together is connected to the nuclear membrane produces the spindle fibres Answer :C

Discussion

16045.	Question : It is established that RNA is the first genetic material. Justify by giving reasons.
Answer» Solution :(i) Three molecular biologists in the early 1980.s (Leslie Orgel, Francis Brick and Carl Woese) independently proposed the .RNA WORLD.as the first stage in the evolutionary of life, a stage when RNA catalysed all molecules necessary for survival and replication. The term .RNA world. first used by Walter Gilbert in 1986, hypothesizes RNA as the first genetic material on earth. There is now enough evidence to suggest that essential life processes (such as metabolism, translation, splicing etc.,) evolved around RNA. RNA has the ability to act as both genetic material and catalyst. (ii) There are several biochemical reactions in living systems that are catalysed by RNA. This catalytic RNA is KNOWN as ribozyme. But, RNA being a catalyst was reactive adn HENCE unstable. (iii) This led to evolution of a more stable form of DNA, with certain chemical modifications. Since DNA is a double stranded molecule having complementary strand, it has resisted changes by evolving a process of repair. (iv) Some RNA molecules function as gene regulators by binding to DNA and affect gene EXPRESSION. (v) Some viruses use RNA as the genetic material. (vi) Andrew Fire and Craig Mellow (recipients of Nobel Prize in 2006) were of the opinion that RNA is an active ingredient in the chemistry of life.

Discussion

16046.	Question : It is appropriate to tell short day plant a long night plant.
Answer» SOLUTION :It is because short day PLANTS REQUIRED a long and UNINTERRUPTED dark period to FLOWER.

Discussion

16047.	Question :It is an ornamental plant belonging to Solanaceae
Answer» Kamanchi Tulip RED DRAGON PETUNIA ANSWER :D

Discussion

16048.	Question : It is advised not to talk or laugh louder while eating. Can you give the reason?
Answer» SOLUTION :If we talk or LAUGH while eating FOOD, food particles MAY enter the wind pipe. This may lead to choking . So it is advised not to talk while eating .

Discussion

16049.	Question : It is a parathyroid gland.
Answer» DECREASES BLOOD `Ca^(+2)` LEVEL Increases blood `Ca^(+2)` level Promotes COLLAGEN synthesis by osteoblasts All of the above Answer :B

Discussion

16050.	Question :It- (I) Liver - Liver lobule II. kidney- Uriniferous tubule III. Ecolog:y - X then what does"X" represent ?
Answer» BIOTIC community Ecosystem Population All of the given Answer :B

Discussion

Explore topic-wise InterviewSolutions in .

Question : The lon involved in stomatal movement is:

Question : Juxtagomeruclar cells of renal cortex synthesize a hormone called(a) ADH(b) oxytocin(c) renin(d) urochrome

Question : Juxtaglomerular cells of renal cortex synthesize a hormone called .........

Question : Juxta glomerular cells of renal cortex synthesize a hormone called :

Question : Juxta glomerular apparatus (JGA) comprises of all of the following except:

Question : Jute is obtained from the secondary phloem of

Question : Jute, Flax, Hemp fibres are morphologically

Question : Justify the role of RUBISCO enzyme which acts as Carboxylase and Oxygenase?

Question : Justify the following statements on the basis of external features : (i)Underground parts of a plant are not always roots . (ii) Flower is a modified shoot.

Question : Justify the following statement on the basis of externalfeatures : "Underground parts of a plant are not always roots."

Question : Justify the statement on the basis of external features that the flower is a modified shoot.

Question : Justify the following statement on the basis of externalfeatures : Flower is a modified shoot.

Question : Justify plant cell as an osmotic system.

Question : Just as HCI is for the pepsinogen, so is the(a) bile juice for fats(b) glucagon for glucose(c) haemoglobin to oxygen(d) enterokinase for trypsinogen

Question : Junctions that help to stop substancs from leaking across a tissue.

Question : Junctions that facilitate the cells to communicate by connecting they cytoplasm of adjoining cells .

Question : Junction between two neurons is called a _______while the junction between a neuron and a muscle fibre is called a _______

Question : Jointed legs, exoskeleton of chitin, haemocoel.

Question : Joint of sternum and ribs is ......

Question : Joint of femur with pelvic girdle is

Question : Joint between metacarpals and phalanges is .............

Question : Name of the joint present between the atlas and axis is

Question : Johnston's organ is present in ……………… .

Question : JNOTAXA is an e-Taxonomic resource useful for

Question : JMV stands for ………………. .

Question : Jersy is a__________breed.

Question : Jelly fish is coelenteron/ctenophora

Question : Jawless mouth, slimy skin without scales, 2-chambered heart.

Question : Jaw suspension characteristic of mammals is

Question : Jaundice is a disease of…………. .

Question : Jamming of wooden doors and windows takes place during rainy season. Give reason

Question : Jack fruit is an example for ...............

Question : It is the practice of mating of the animals of same breed, having no common ancestors on either side of their pedigree up to 4 to 6 generations

Question : It is said that the one cycle of cell division in human cells (eukaryotic cell) takes 24 hours. Which phase of the cycle, do you think occupies the maximum part of cell cycle ?

Question :It is said that the one cycle of cell division in human cells (eukaryotic cells) takes 24 hours. Which phase of the cycle, do you think occupies the maximum part of cell cycle ?

Question :it is observed that heart, cells do not exhibit cell division. Such cells do not divide further and exit ………………………………. phase to enter an inactive stage called ………………………. of cell cycle.

Question :It is observed that heart cells do not exhibit cell division. Such cells do not divide further and exit ......... phase to enter an inactive stage called .......... of cell cycle. Fill in the blanks.

Question : It isnecessary to send /deliverblood from rightventricleto lungs.

Question : It is necessary that Calvin cycle runs for six times.

Question : It is known that some varieties of wheat are sown in autumn but are harvested around next mid summer. (A) What could be the probable reason for this? (B) What term is used for this promotion of lowering under low temperature ? (C) Which plant hormone can replace the cold treatment?

Question : It is knownthatred musclefibres in animalscan work for longer periods of time continuously . Howis thispossible ?

Question :It is important that the centromere does not divide until the end of metaphase because it (a) contains the genes that control prophase(b) holds the replicated DNA molecules together(c) is connected to the nuclear membrane(d) produces the spindle fibres

Question : It is established that RNA is the first genetic material. Justify by giving reasons.

Question : It is appropriate to tell short day plant a long night plant.

Question :It is an ornamental plant belonging to Solanaceae

Question : It is advised not to talk or laugh louder while eating. Can you give the reason?

Question : It is a parathyroid gland.

Question :It- (I) Liver - Liver lobule II. kidney- Uriniferous tubule III. Ecolog:y - X then what does"X" represent ?

Question : Junction between two neurons is called a _while the junction between a neuron and a muscle fibre is called a _