Description : Acrosome reaction in sperm is triggered by (a) capacitation (b) release of lysin (c) influx of Na+ (d) release of fertilizin.
Last Answer : (c) total
Description : Write the function of each of the following (i)Seminal vesicle (ii)Scutellum (iii)Acrosome of human sperm -Biology
Last Answer : (i)Seminal vesicle spermatogenesis It secretes an alkaline fluid that helps in neutralising the acidity of the vaginal tract and thereby increase the lifespan of sperms. Secretion of seminal vesicle is ... which help the sperm enter into the cytoplasm of the ovum and thus helps in fertilisation.
Description : Acrosome of sperm contains
Last Answer : Acrosome of sperm contains A. Hydrolytic enzymes B. DNA C. Fructose D. Mitochondria.
Description : In the absence of acrosome the sperm
Last Answer : In the absence of acrosome the sperm A. Cannot penetrate the egg B. Cannot get food C. Cannot get energy D. Cannot swim.
Description : Acrosome reaction of sperm is triggered by
Last Answer : Acrosome reaction of sperm is triggered by A. Capacitation B. Release of lysin C. Release of fertilizin D. Influx of `Na^(+)`
Last Answer : Acrosome of sperm contains A. Hyluronidase and acrosin B. Hyaluronic acid and acrosin C. Hippuric acid and uric acid D. Creatinine.
Description : Which part of the spermatid forms acrosome of sperm ?
Last Answer : Which part of the spermatid forms acrosome of sperm ? A. Mitochondria B. Golgi body C. Nucleus D. Lysosome
Description : What happens during fertilisation in humans after many sperms reach close to the ovum? (a) Secretions of acrosome helps one sperm enter cytoplasm of ovum through zona pellucida. (b) All sperms except ... all the sperms except one. (d) Only two sperms nearest the ovum penetrate zona pellucida.
Last Answer : (a) Secretions of acrosome helps one sperm enter cytoplasm of ovum through zona pellucida.
Description : Which one of the following statements about human sperm is correct? (a) Acrosome has a conical pointed structure used for piercing and penetrating the egg, resulting in fertilisation. (b) The ... a sensory structure leading the sperm towards the ovum. (d) Acrosome serves no particular function
Last Answer : (b) The sperm lysins in the acrosome dissolve the egg envelope facilitating fertilisation.
Description : 9.Acrosome is important for ----------- . a)ATP production, b)Dissolving membrane of ovum, c)Motility of sperm, d)Nutrition of sperm
Last Answer : b)Dissolving membrane of ovum,
Description : Assertion : When sperm enters in egg , one polar body is released in human . Reason : At the time of ovulation eggs found in secondary Oocyte phase .
Last Answer : Assertion : When sperm enters in egg , one polar body is released in human . Reason : At the time ... False . D. If both Assertion & Reason are False.
Description : Write the function of each of the following (i)Middle piece in human sperm (ii)Tapetum in anthers (iii)Luteinising hormone in human males -Biology
Last Answer : (i)Middle piece in human sperm contains several mitochondria which produces energy for the motility of the sperm. (ii) Tapetum in anthers It is the innermost layer of the anther. ... male stimulates the Leydig cells to produce testosterone, necessary to complete the process of spermatogenesis.
Description : A cross section at mid point of the middle piece of human sperm will show
Last Answer : A cross section at mid point of the middle piece of human sperm will show A. Centrioe, ... microtublues D. 9+2 arrangement of microtubules only.
Description : The middle piece of the sperm contains (a) proteins (b) mitochondria (c) centriole (d) nucleus.
Last Answer : (b) mitochondria
Description : WRITE THE FUNTION OF EACH OF THE FOLLOWING: (a) MIDDLE PIECE OF HUMAN SPERM (b) LUTEINIZING HORMONE IN HUMAN MALES
Last Answer : ANS. (a) PROVIDES ENERGY FOR MOVEMENT DUE TO PRESENCE OF MITOCHONDRIA. (c) STIMULATES SYNTHESIS AND SECRETION OF ANDROGENS.
Description : How many polar bodies are produced during the entire process of oogenesis in unmarried human female ?
Last Answer : How many polar bodies are produced during the entire process of oogenesis in unmarried human female ? A. Three B. Two C. One D. Four
Description : The glycoprotein fertilizin is secreted by
Last Answer : The glycoprotein fertilizin is secreted by A. Ovum B. Ovary C. Sperm D. Testis.
Description : A mature sperm has
Last Answer : A mature sperm has A. A pair of flagella B. A nucleus, an acrosome, and a centriole C. A ... nucleus, an crosome , a pair of centrioles and a tail
Description : $ Sperm in Bryophytes are flagellated. ! Sperms in bryophytes move to the mature and dehisced archegonia, under the effect of chemicals.
Last Answer : $ Sperm in Bryophytes are flagellated. ! Sperms in bryophytes move to the mature and dehisced archegonia, under ... D. If both As and R are wrong.
Last Answer : A mature sperm has A. A pair of flagella B. A nucleus , an acrosome and a centriole C. A nucleus ... an acrosome , a pair of centrioles and a tail .
Description : The head of a mature sperm is mainly composed of :-
Last Answer : The head of a mature sperm is mainly composed of :- A. elongated nucleus and acrosomal material . B. ... & the axial filament . D. All of the above
Description : Normally in the head of a mature sperm cytoplasm is :-
Last Answer : Normally in the head of a mature sperm cytoplasm is :- A. Present in large amount B. Present in ... amount C. Present in very little amount D. Absent
Description : Extrusion of second polar body from egg occurs (a) simultaneously with first cleavage (b) after entry of sperm but before fertilisation (c) after fertilisation (d) before entry of sperm into ovum.
Last Answer : (b) after entry of sperm but before fertilisation
Description : When embryosac receives two or more than two pollen tubes the sperm nucleus fusing with the egg nucleus may be derived from one pollen tube and one fusing with the polar nuclei may be derived from other pollen tube, the phenomenon is termed as
Last Answer : When embryosac receives two or more than two pollen tubes the sperm nucleus fusing with the egg nucleus may be derived from one pollen tube and one fusing with the polar nuclei may be derived from other pollen tube, the phenomenon is termed as – Heterofertilization
Description : The mature proglottids having fertilized eggs in the uterus of tapeworm are regularly dtached. This process is known as
Last Answer : The mature proglottids having fertilized eggs in the uterus of tapeworm are regularly dtached. This ... B. Proliferation C. Strobilation D. Topolysis
Description : In the prothallus of a vascular cryptogam, the antherozoids and eggs mature at different times. As a result (a) there is high degree of sterility (b) one can conclude that the plant is apomictic (c) self fertilization is prevented (d) there is no change in success rate of fertilization.
Last Answer : (c) self fertilization is prevented
Description : Would you donate your sperm or eggs to a biological sibling you don't know well?
Last Answer : Yes, I would have, but I didn’t hear much of that in my day.
Description : What do you think about donating your sperm/eggs or being a surrogate for others to have children?
Last Answer : Never have, but would, for anyone who needed it; for free. this type of thing should never be for profit
Description : In the human anatomy, eggs and Sperm are a form of which of the followingA.Asexual reproduction B.Sexual reproduction C.GametesD.Somatic cells?
Last Answer : The answer is C. Gametes
Description : I am a 50 year old female and my husband is 47 we want to have a baby but i don't have any eggs and he has low count sperm how can we do it to have baby. Do you recommend invitro or surrogate mother ?
Last Answer : I would suggest surrogacy because of your age. Invitro would carry to many risks for the unborn baby, plus it might not even work. With surrogacy you could almost guarantee success.
Description : Which is an example of negative feedback? A) Nursing action stimulates the hypothalamus to release oxytocin that triggers mammary gland milk production. B) When the blood becomes dilute, ADH ... produce sperm or eggs. E) TRH stimulates the anterior pituitary to release thyroid-stimulating hormone.
Last Answer : B) When the blood becomes dilute, ADH is no longer released from the hypothalamus
Description : Polar bodies develop during the formation of
Last Answer : Polar bodies develop during the formation of A. Oogenesis B. Spermstogenesis C. Spermiogenesis D. Somatic hybridisation.
Description : What is the total number of polar bodies formed during oogenesis in the ovary?
Last Answer : What is the total number of polar bodies formed during oogenesis in the ovary? A. 4 B. 3 C. 1 D. 2
Description : Assertion : During oogenesis polar bodies are formed . Reason : Primary function of formation of polarbodies is to bring haploidy of ovum .
Last Answer : Assertion : During oogenesis polar bodies are formed . Reason : Primary function of formation of ... . If both Assertion & Reason are False.
Description : Which piece of a sperm is called power house ?
Last Answer : Which piece of a sperm is called power house ? A. Head piece B. Neck piece C. Middle piece D. Tail piece
Description : Acrosome is made up of
Last Answer : Acrosome is made up of A. Mitochondria B. Centrioles C. golgi bodies D. Ribosomes.
Description : Which set of enzymes is found in the acrosome of mammalian spermatozoa :
Last Answer : Which set of enzymes is found in the acrosome of mammalian spermatozoa : A. Hyaluronidase , ... Hyaluronidase , CPE , Peptidase D. Hyaluronidase only
Description : Acrosome of spermatozoa is formed from :
Last Answer : Acrosome of spermatozoa is formed from : A. Lysosomes B. Golgi bodies C. Ribosome D. Mitochondria
Description : The acrosome plays a role in :-
Last Answer : The acrosome plays a role in :- A. Fusion of nuclei of gametes B. Motality of sperm C. Penetration of sperm into ovum D. All of the above
Description : Space between acrosome and nucleus is called :-
Last Answer : Space between acrosome and nucleus is called :- A. Nebenkern B. Perforatorium C. Nucleus of Pander D. Perivitelline space
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 : Double fertilisation is fusion of (a) two eggs (b) two eggs and polar nuclei with pollen nuclei (c) one male gamete with egg and other with synergid (d) one male gamete with egg and other with secondary nucleus.
Last Answer : (d) one male gamete with egg and other with secondary nucleus.
Description : Double fertilisation is (a) fusion of two male gametes of a pollen tube with two different eggs (b) fusion of one male gamete with two polar nuclei (c) fusion of two male gametes with one egg (d) syngamy and triple fusion.
Last Answer : (d) syngamy and triple fusion.
Description : Double fertilization is (1) Fusion of two male gametes of a pollen tube with two different eggs (2) Fusion of one male gamete with two polar nuclei (3) Fusion of two male gametes with one egg (4) Syngamy and triple fusion
Last Answer : (4) Syngamy and triple fusion
Description : The sperm producing substance of enzymatic nature of sperm lysine. In mammals it is called
Last Answer : The sperm producing substance of enzymatic nature of sperm lysine. In mammals it is called A. ... B. Hyaluronic acid C. Androgamone D. Gyanogamone
Description : If continents weren't separated by large bodies of water, and the entire world lived on one piece of land (but still with lakes and rivers) do you think there would be less hatred and ignorance in the world?
Last Answer : No – I think it would be as bad or worse since some of the worst conflicts are between neighboring countries or tribes.
Description : Thin cytoplasmic layer is present in middle part of sperm is called :-
Last Answer : Thin cytoplasmic layer is present in middle part of sperm is called :- A. Nebenkern B. Manchette C. Axial filament D. Zensen ring
Description : 7.Both B & T lymphocytes are produced in the bone marrow; however, only the T lymphocytes travel to the ______ and mature there. 1. Spleen 2. Thymus 3. Pituitary gland 4. Adrenal gland
Last Answer : Ans: Thymus
Description : 1. Both B & T lymphocytes are produced in the bone marrow; however, only the T lymphocytes travel to the ______ and mature there. a. Spleen b. Thymus c. Pituitary gland d. Adrenal gland
Last Answer : b. Thymus
Description : An antibiotic is - (1) achemical synthesized by a human cell against a microorganism (2) a chemical synthesised by amicro-organism against another micro-organisms (3) a substance produced by blood cells against bacteria (4) a substance produced by blood cells against infection.
Last Answer : (2) a chemical synthesised by amicro-organism against another microorganisms Explanation: An antibacterial is an agent that inhibits bacterial growth or kills bacteria. The term is often used ... by a microorganism that is antagonistic to the growth of other microorganisms in high dilution.