Description : Conversion of testosterone to dihydrotestosterone by the enzyme 5α-reductase is required for the following actions except: A. Formation of male external genitalia in the foetus B. Prostatic hypertrophy in elderly males C. Pubertal changes in the male adolescent D. Spermatogenesis
Last Answer : D. Spermatogenesis
Description : During spermatogenesis, the first meotic division occurs in
Last Answer : During spermatogenesis, the first meotic division occurs in A. Sertoli cells B. Spermatids C. Spermatozoans D. Primary spermatocytes
Description : Spermatogenesis occurs in
Last Answer : Spermatogenesis occurs in A. Vasa deferentia B. Epididymis C. Seminiferous tubules D. Penis.
Description : Acrosome formation in spermatogenesis occurs in which stage ?
Last Answer : Acrosome formation in spermatogenesis occurs in which stage ? A. First meiotic division B. Second meiotic division C. Growth phage D. Spermiogenesis
Description : The reaction, C + CO2 ↔ 2CO, taking place during coal gasification is called the __________ reaction. (A) Neumann reversal (B) Shift conversion (C) Boudouard (D) Reduction
Last Answer : (C) Boudouard
Description : Arrange in correct sequence the structures formed during spermatogenesis a) spermatogonia b) Secondary spermatocyte c) Spermatogonial stem cells c) sp
Last Answer : Arrange in correct sequence the structures formed during spermatogenesis a) spermatogonia b) Secondary spermatocyte c) ... -d-e D. c-d-a-b-c
Description : During spermatogenesis, the diploid cells are
Last Answer : During spermatogenesis, the diploid cells are A. Primary spermatocyte and spermtogonium B. ... spermatid. D. Primary spermatocyte and spermatid.
Description : Secondary spermatocytes undergo second meiotic division during spermatogenesis to produce.
Last Answer : Secondary spermatocytes undergo second meiotic division during spermatogenesis to produce. A. ... Spermatogonia `rarr` Sperms D. Spermatogonia
Description : Assertion : During embrynic stage testes descend down and at the time of birth , it comes into scrotum . Reason : Spermatogenesis process requires les
Last Answer : Assertion : During embrynic stage testes descend down and at the time of birth , it comes into scrotum ... . D. If both Assertion & Reason are False.
Description : During spermatogenesis how many spermatozoa are formed from a single primary spermatocyte
Last Answer : During spermatogenesis how many spermatozoa are formed from a single primary spermatocyte A. 1 B. 2 C. 4 D. 8
Description : Select the answer which correctly matches the endocrine gland with the hormone it secretes and its function/deficiency symptom. Endocrine Hormone Function/ gland Deficiency symptoms (a) ... child birth (d) Posterior Growth Oversecretion pituitary hormone stimulates (GH) abnormal growth
Last Answer : (a) Thyroid Thyroxine Lack of iodine gland in diet results in goitre
Description : Assertion : Replication of DNA not occurs during interkinesis. Reason : Divison of chromosomes takes place during meiosis-II.
Last Answer : Assertion : Replication of DNA not occurs during interkinesis. Reason : Divison of chromosomes takes place ... . If both Assertion & Reason are false.
Description : Assertion : Meiosis is also known as reduction division. Reason : Meiosis reduces the number of chromosomes in daughter cells.
Last Answer : Assertion : Meiosis is also known as reduction division. Reason : Meiosis reduces the number of ... D. If both Assertion & Reason are false.
Description : Bacteria lack alternation of generation because there is (a) neither syngamy nor reduction division (b) distinct chromosomes are absent (c) no conjugation (d) no exchange of genetic materia
Last Answer : (a) neither syngamy nor reduction division
Description : Which two distinct microbial processes are responsible for the release of fixed nitrogen as dinitrogen gas (N2) to the atmosphere? (a) Aerobic nitrate oxidation and nitrite reduction (b) ... fixation by Rhizobium in root nodules of legumes (d) Anaerobic ammonium oxidation and denitrification
Last Answer : (d) Anaerobic ammonium oxidation and denitrification
Description : Electrolytic reduction cell used for conversion of calcined Al2O3to Al is a carbon lined furnace operating at 800-900 °C. The purpose of electric current supplied to the furnace is to (A) Achieve very high ... by the generation of heat (C) Electrolytically dissociate alumina (D) Both (B) & (C)
Last Answer : (D) Both (B) & (C)
Description : Addition of pyrazinamide and ethambutol for the first two months to the isoniazid + rifampin therapy of tuberculosis serves the following purpose(s): A. Reduces the total duration of therapy to 6 months B. ... sputum conversion C. Permits reduction of rifampin dose D. Both A' and B' are correct
Last Answer : D. Both ‘A’ and ‘B’ are correc
Description : What is the process of Spermatogenesis & Oogenesis -Biology
Last Answer : answer:
Description : Where does spermatogenesis occur? -Biology
Description : What is spermatogenesis ?
Last Answer : Spermatogenesis is the process by which haploid spermatozoa or sperm are produced from the seed cell in the seminiferous duct of the egg or testis.
Last Answer : Spermatogenesis is the process by which haploid spermatozoa or sperm are produced from seed cells in the seminiferous duct of the egg or testis.
Description : If spermatogenesis proceeds rapidly, inhibin is released. Inhibin reduces secretion of
Last Answer : If spermatogenesis proceeds rapidly, inhibin is released. Inhibin reduces secretion of A. ... Testerone D. Interstitial cell stimulating hormone.
Description : In mammals, spermatogenesis is stimulated by
Last Answer : In mammals, spermatogenesis is stimulated by A. MSH B. TSH C. ADH D. FSH.
Description : Hormone responsible for spermatogenesis is
Last Answer : Hormone responsible for spermatogenesis is A. Androgen B. Progesterone C. Testosterone D. None of these.
Description : Spermatogenesis changes
Last Answer : Spermatogenesis changes A. Spermatogonium into primary spermatocyte B. Primary spermatocyte into secondary ... into spermatid D. All the above.
Description : Spermatogenesis is formation of
Last Answer : Spermatogenesis is formation of A. Ovary B. Ovum C. Sperm D. Zygote.
Description : Which is the correct sequenc e in spermatogenesis?
Last Answer : Which is the correct sequenc e in spermatogenesis? A. Spermatogonia `rarr` Spermatids `rarr` ... spermatocytes `rarr` Spermatids `rarr` Spers.
Description : In spermatogenesis, a primary spermatocyta produce four similar sperms while in oognesis a primary oocyte forms
Last Answer : In spermatogenesis, a primary spermatocyta produce four similar sperms while in oognesis a primary oocyte ... One large ovum and 2-3 polar bodies.
Description : At which stage of spermatogenesis sperm acquire their whole structural maturity and they contain a haploid nucleus & other organs-
Last Answer : At which stage of spermatogenesis sperm acquire their whole structural maturity and they contain a ... C. Multiplication phase D. Maturation phase
Description : Correct order of spermatogenesis is :-
Last Answer : Correct order of spermatogenesis is :- A. Spermatocytes , Spermatogonia , Spermatid , Sperm B ... , Sec. Spermatocytes , Spermatid , Sperm
Description : The process of spermatogenesis and oogenesis in most vertebrates are under the influence of which hormone ?
Last Answer : The process of spermatogenesis and oogenesis in most vertebrates are under the influence of which hormone ? A. Oxytocin B. FSH C. ACTH D. ICSH
Description : Longest phase of spermatogenesis is :-
Last Answer : Longest phase of spermatogenesis is :- A. Multiplication phase B. Growth phase C. Maturation phase D. Germinal phase
Description : Spermatogenesis process occur in
Last Answer : Spermatogenesis process occur in A. Rete testis B. Seminiferous Tubules C. Septula testis D. Mediastinum testis
Description : Spermatogenesis and sperm differentiation are under the control of
Last Answer : Spermatogenesis and sperm differentiation are under the control of A. FSH B. LH C. Progesterone D. Parathyroid Harmone
Description : Spermatogenesis is influenced by
Last Answer : Spermatogenesis is influenced by A. Progestrone B. FSH C. TSH D. LTH
Description : Which of the following approaches does not give the defined action of contraceptive? (a) Hormonal contraceptives Prevent/retard entry of sperms, prevent ovulation and fertilisation (b) ... devices Increase phagocytosis of sperms, suppress sperm motility and fertilising capacity of sperms
Last Answer : (b) Vasectomy Prevents spermatogenesis
Description : DESCRIBE THE PROCESS OF OOGENESIS IN HUMAN FEMALE AND DIFFERENTIATE IT WITH SPERMATOGENESIS ON THE BASIS OF TIME OF INITIATION AND THE PRODUCTS FORMED.
Last Answer : ANS. OOGENESIS : DIAGRAMMATIC REPRESENTATION AS GIVEN IN NCERT. DIFFERENCES BETWEEN : OOGENESIS SPERMATOGENESIS (i) STARTS DURING FOETAL LIFE (i) STARTS DURING PUBERTY (ii)PRODUCTS: OVUM (ii) SPERMS
Description : WHEN DO THE OOGENESIS AND THE SPERMATOGENESIS INITIATE IN HUMAN FEMALES AND MALES RESPECTIVELY ?
Last Answer : ANS. OOGENESIS AT THE FOETAL LIFEAND SPERMATOGENISIS STARTS AT PUBERTY.
Description : When homologous chromosomes crossover what occurs? -Biology
Description : In the shortest phase of mitosis the sep- aration of newly formed chromosomes occurs. Which is that phase?
Last Answer : Anaphase
Description : Synapsis occurs between (a) mRNA and ribosomes (b) spindle fibres and centromere (c) two homologous chromosomes (d) a male and a female gamete.
Last Answer : (c) two homologous chromosomes
Description : Recombination of virus genomes occurs A- by transduction B- by transcription C- simultaneous infection of a host cell by two viruses with homologous chromosomes D- by transformation
Last Answer : simultaneous infection of a host cell by two viruses with homologous chromosomes
Description : Synapsis and crossing over of chromosomes occurs i which phases of meiosis? a) Interphase b) Prophase c) Meterphase d) Teleophase
Last Answer : ANSWER: B -- PROPHASE
Description : Conversion of chemical energy into electrical energy occurs in which thing? -General Knowledge
Last Answer : The answer is 'Battery'
Last Answer : Battery The chemical energy of the chemicals used is changed into the electric energy used to run electrical appliances.
Description : Electric charge separation or quantum conversion occurs at
Last Answer : Electric charge separation or quantum conversion occurs at A. Antenna molecuels B. Thylakoid membrane C. Reaction center D. Stroma
Description : Conversion of the linear tetrapyrrole hydroxymethylbilane to uroporphyrinogen III (A) Occurs spontaneously (B) Catalysed by uroporphyrinogen I synthase (C) Catalysed by uroporphyrinogen III cosynthase (D) Catalysed by combined action of uroporphyrinogen I synthase and uroporphyrinogen III cosynthase
Last Answer : Answer : D
Description : Oxidative conversion of many amino acids to their corresponding -ketoacids occurs in mammalian: (A) Liver and kidney (B) Adipose tissue (C) Pancreas (D) Intestine
Last Answer : Answer : A