which is the correct sequence of events in the origin of life: I. Formation of protobionts II. Synthesis of organic monomers III. Synthesis of organic

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which is the correct sequence of events in the origin of life: I. Formation of protobionts II. Synthesis of organic ... II, III, IV D. I, III, II, IV

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Description : Which of the following is the correct sequence of events in the origin of life? I. Formation of protobionts II. Synthesis of organic monomers III. Synthesis of organic polymers IV. Formation of DNA-based genetic systems (a) I, II, III, IV (b) I, III, II, IV (c) II, III, I, IV (d) II, III, IV, I

Last Answer : c) II, III, I, IV

Description : Which is incorrect about protobionts in abiogenic origin of life?

Last Answer : Which is incorrect about protobionts in abiogenic origin of life? A. They were partially ... separate combination of molecules from the surroundings

Description : Which one of the following is incorrect about the characteristics of protobionts (coacervates and microspheres) as envisaged in the abiogenic origin of life? (a) They were partially isolated from ... were able to reproduce. (d) They could separate combinations of molecules from the surroundings.

Last Answer : (c) They were able to reproduce

Description : Which one of the following is incorrect about the characteristics of protobionts (coacervates and microspheres) as envisaged in the abiogenic origin o

Last Answer : Which one of the following is incorrect about the characteristics of protobionts ( ... separate combinations of moelcules from the surroundings

Description : Arrange the following events of meiosis in correct sequence (i) Crossing over (ii) Synapsis (iii)Terminalisation of chiasmata (iv) Disappearance of nucleolus (a) (i), (ii), (iii), (iv) (b) (ii), (iii), (iv), (i) (c) (ii), (i), (iv), (iii) (d) (ii), (i), (iii), (iv)

Last Answer : (d) (ii), (i), (iii), (iv)

Description : Which one of the following is the correct sequence for the events of phagocytosis? a. Cell attachment, acidification, phagosome formation, lysosome degradation b. Cell ... attachment, acidification. lysosome degradationd. Cell attachment phagosome formation, lysosome degradation. acidification

Last Answer : Cell attachment, phagosome formation, acidification, lysosome degradation

Description : What happens to monomers when they undergobdehydration synthesis?

Last Answer : What is the answer ?

Description : The formation of initiation complex during protein synthesis requires a factor: (A) IF-III (B) EF-I (C) EF-II (D) IF-I

Last Answer : Answer : A

Description : Match the column I with column II. Column-I Column-II A. Golgi apparatus (i) Synthesis of protein B. Lysosomes (ii) Trap waste and excretory products C. Vacuoles (iii) Formation of glycoproteins and glycolipids D. Ribosomes (iv) Digesting ... ), C-(iv), D-(i) (d) A-(i), B-(ii), C-(iv), D-(iii)

Last Answer : (a) A-(iii), B-(iv), C-(ii), D-(i)

Description : A metabolic pathways is a (A) Route taken by chemicals (B) Sequence of enzyme facilitated chemical reactions (C) Route taken by an enzyme from one reaction to another (D) Sequence of origin of organic molecules

Last Answer : Answer : B

Description : $ The process of formation of polysaccharides by condensation of monomers is called hydrolysis. Glycogen is a stored food materials found in plants.

Last Answer : $ The process of formation of polysaccharides by condensation of monomers is called hydrolysis. Glycogen is a ... D. If both As and R are wrong.

Description : How do scientist think protobionts formed?

Last Answer : Biological molecules were trapped in molecular bubbles.Cell like structures formed from molecular bubbles-apexx

Description : How doe scientists think protobionts formed?

Last Answer : Scientists think that protobionts formed by accidental natural causes.

Description : Read the following four statements, (i), (ii), (iii) and (iv) and select the right option having both correct statements. Statements : (i) Z scheme of light reaction takes place in presence of PSI only. (ii) Only PSI is ... and (iv) (b) (i) and (ii) (c) (ii) and (iii) (d) (iii) and (iv)

Last Answer : (a) (ii) and (iv)

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Last Answer : (d) A-(ii), B-(iii), C-(v), D-(iv)

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Last Answer : (a) III – 1, IV – 2, I – 3, II – 4

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Last Answer : (B) (i), (iii), (ii)

Description : Match column -I with column - II. Column-I Column-II A. Saprophyte (i) Symbiotic association of fungi with plant roots B. Parasite (ii) Decomposition of dead organic materials C. Lichens (iii) Living on living plants or animals D. ... (iii) (iv) (c) (iii) (ii) (i) (iv) (d) (ii) (i) (iii) (iv)

Last Answer : (a) (ii) (iii) (iv) (i)

Description : Pick up the correct statement from the following: (A) The substance which consists of one primary chemical, is known as monomer (B) The polymer consists of thousands of monomers joined together (C) The polymer molecule is called macro-molecule (D) All the above

Last Answer : Answer: Option D

Description : Identify the correct sequence of events in a cardiac cycle `:-`

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Description : Observe the given figure of ATP sysnthesis through chemiosmosis and arrange the followign events in correct sequence (a) Movement of `e^(-)` through H

Last Answer : Observe the given figure of ATP sysnthesis through chemiosmosis and arrange the followign events in ... the ATPase (e) Formation of ATP molecule

Description : Arrange the following events of meiosis in the correct sequence - A. Terminalisation of chiasmata B. Crossing over C. Synapsis D. Disjunction of chrom

Last Answer : Arrange the following events of meiosis in the correct sequence - A. Terminalisation of chiasmata ... ` C. `CtoBtoDtoEtoA` D. `CtoBtoEtoAtoD`

Description : Arrange the following events of meiosis in correct sequence : (a) Crossing over (b) Synapsis ( c ) Terminalisation of chaismata (d) Disappearance of n

Last Answer : Arrange the following events of meiosis in correct sequence : (a) Crossing over (b) Synapsis ( c ) Terminalisation of ... . (a), (b), ( c ), (d)

Description : Which of the following options gives the correct sequence of events during mitosis ? (a) Condensation → Nuclear membrane disassembly → Arrangement at equator → Centromere division → Segregation ... (d) Condensation → Nuclear membrane disassembly → Crossing over → Segregation → Telophase

Last Answer : (a) Condensation → Nuclear membrane disassembly → Arrangement at equator → Centromere division → Segregation → Telophase

Description : $ Progenote is considered to be the more ancient form of life which gave rise to archaeobacteria and eubacteria. ! Monomers are always multicellular.

Last Answer : $ Progenote is considered to be the more ancient form of life which gave rise to archaeobacteria and eubacteria ... D. If both As and R are wrong.

Description : Match column I with column II and select the correct option using the given codes. Column I Column II A. Mons pubis (i) Embryo formation B. Antrum (ii) Sperm C. Trophectoderm (iii)Female external genitalia D. Nebenkern (iv) Graafian ... (i), C-(iv), D-(ii) (d) A-(i), B-(iv), C-(iii), D-(ii

Last Answer : (b) A-(iii), B-(iv), C-(i), D-(ii)

Description : Match column I with column II and select the correct option using the codes given below. Column I Column II A. Pistils fused together (i) Gametogenesis B. Formation of gametes (ii) Pistillate C. Hyphae of higher (iii) Syncarpous ascomycetes D ... , C-(iv), D-(iii) (d) A-(iii), B-(i), C-(iv), D-(ii)

Last Answer : (d) A-(iii), B-(i), C-(iv), D-(ii)

Description : During the course of origin of life what was the sequence of substances which appeared on earth:

Last Answer : During the course of origin of life what was the sequence of substances which appeared on earth: ... D. Ammonia, Amino acids, proteins, nucleic acids

Description : The correct sequence of electron acceptor in ATP synthesis is (a) Cyt. b, c, a3, a (b) Cyt. c, b, a, a3 (c) Cyt. a, a, b, c (d) Cyt. b, c, a, a3.

Last Answer : (d) Cyt. b, c, a, a3.

Description : The complex organic compounds that may have first evolved in the direction of origin of life on earth, may have been

Last Answer : The complex organic compounds that may have first evolved in the direction of origin of life on ... Proteins, nucleic-acid D. Protein, amino-acid

Description : 6. In 1953 S L Miller created primitive earth conditions in the laboratory and gave experimental evidence for origin of first form of life from pre existing non living organic molecules. The ... -reducing atmosphere. d) High temperature, volcanic storms, reducing atmosphere and contains NH3 and CH4

Last Answer : d) High temperature, volcanic storms, reducing atmosphere and contains NH3 and CH4

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Last Answer : Ans: (b)

Description : Which of the following are the main reasons for the origin of the south-west monsoon in India? 1. Development of a low pressure in north-west India 2. Deflection of trade winds 3. Arrival of cyclonic stream from the Pacific Ocean ... (a) I, II and III (b) I and II (c) II and III (d) III and IV

Last Answer : Ans: (b)

Description : What steps shall be required to rotate an object about the point P1 (as shown in fig.1) and its placement such that what was at P1 is now reduced and is at P2 (as shown in fig.2). I. Translate P1 to origin II. ... (A) I,II and III (B) II,III and IV (C) I,III and IV (D) All of the above

Last Answer : Answer: Marks given to all

Description : (i)Explain the events taking place at the time of fertilisation of an ovum in a human female. (ii)Trace the development of the zygote up to its implantation in the uterus. (iii)Name and draw a labelled sectional view of the embryonic stage that gets implanted. -Biology

Last Answer : (i)In humans, the fertilisation of ovum takes place in ampullary-isthmic junction of Fallopian tube. The events that occur during the process of fertilisation are: (a) The sperm reaches the ... endometrium of the uterus. This is called implantation.(iii) Blastocyst stage implants in the uterus.

Description : Given below are the events that lead to pregnancy and development of embryo i. fertilisation of egg ii. maturation of egg iii. release of egg iv. embedding of embryo in uterus a) i, ii, iii, iv b)ii, i, iii, iv c)i, iv , ii, iii d)ii, iii, i , iv,

Last Answer : d)ii, iii, i , iv,

Description : (a) IN WHICH PART OF HUMAN FEMALE REPRODUCTIVE SYSTEM DO THE FOLLOWING EVENTS TAKE PLACE. (i) RELEASE OF FIRST POLAR BODY (ii) RELEASE OF SECOND POLAR BODY (iii) FERTILISATION (iv) IMPLANTATION (b) NAME TWO HORMONES SECREATED ONLY DURING PREGNANCY.

Last Answer : ANS (a) (i) OVARY (ii) FALLOPIAN TUBE (iii) AMPULLA-ISTHAMUS JUNCTION OF FALLOPIAN TUBE (iv) ENDOMETRIUM LINING OF UTERUS (b) HUMAN CHORIONIC GONADOTROPIN AND HUMAN PLACENTAL LACTOGEN

Description : The correct sequence for the manufacture of molecules/organic compounds on the primitive earth is (a) NH3, nucleic acid, protein and carbohydrate (b) protein, carbohydrate, water and nucleic acid (c) NH3, protein, carbohydrate and nucleic acid (d) NH3, water, nucleic acid and protein.

Last Answer : (d) NH3, water, nucleic acid and protein.

Description : If Organic sources of carcinogenic compounds in water persist even after chlorination, then what is the correct sequence among treatment processes listed below if all these are considered compulsory ? 1. Coagulation 2. Sedimentation 3. Filtration in ... c) 4- 2- 3- 1- 5 and 6 d) 1-5-2-3-4 and 6

Last Answer : d) 1-5-2-3-4 and 6

Description : Time gap in between formation of earth & origin of life :

Last Answer : Time gap in between formation of earth & origin of life : A. `0.5` Billion years B. 1Billion years C. `4.5` Billion years D. `4.0` Billion years

Description : In mammals, synthesis of mRNA is catalysed by (A) RNA polymerase I (B) RNA polymerase II (C) RNA polymerase III(D) RNA polymerase IV

Last Answer : Answer : B

Description : The removal of which enzyme affects the synthesis of hnRNA in eukaryotes a) RNA polymerase II b) RNA primase c) RNA polymerase III d) RNA polymerase I

Last Answer : a) RNA polymerase II

Description : . Arrange the developments related to European history in a chronological sequence. I. Napoleon invaded Italy. II. Unification of Italy. III. Unification of Germany. IV. Vienna Settlement. (1) I, III, II and IV (2) I, II, IV and III (3) I, IV, II and III (4) I, II, III and IV

Last Answer : (3) I, IV, II and III

Description : The correct sequence of spermatogenetic stages leading to the formation of sperms in a mature human testis is

Last Answer : The correct sequence of spermatogenetic stages leading to the formation of sperms in a mature ... . Spermatogonia - Spermatocyte - Spermatid - Sperms

Description : Which one of the following is the correct sequence of the age of formation-from the youngest to the oldest-of the given mountain ranges? (a) Himalayas, Vindhyas, Western Ghats, Deccan Traps ( ... ) Himalayas, Western Ghats, Vindhayas, Deccan Traps (d) Vindhyas, Himalayas, Deccan Traps, Western Ghats

Last Answer : Ans: (a)

Description : The correct sequence of spermatogenetic stages leading to the formation of sperms in a mature human testis is (a) spermatogonia - spermatocyte - spermatid - sperms (b) spermatid - spermatocyte ... - spermatid - spermatocyte - sperms (d) spermatocyte - spermatogonia - spermatid - sperms

Last Answer : a) spermatogonia - spermatocyte - spermatid - sperms

Description : What is the correct sequence of sperm formation? (a) Spermatogonia, spermatozoa, spermatocytes, spermatids (b) Spermatogonia, spermatocytes, spermatids, spermatozoa (c) Spermatids, spermatocytes, spermatogonia, spermatozoa (d) Spermatogonia, spermatocytes, spermatozoa, spermatids

Last Answer : (b) Spermatogonia, spermatocytes, spermatids, spermatozoa