What is arrangement of microtubules in middle piece? -Biology

What is arrangement of microtubules in middle piece? -Biology
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What is arrangement of microtubules in middle piece? -Biology

Description : What is arrangement of microtubules in middle piece? -Biology

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Primary differences between cilia and flagella are A- arrangement of microtubules B- length and location of basal bodies C- how the microtubules are fused to each other D- number, length and direction of force

Description : Primary differences between cilia and flagella are A- arrangement of microtubules B- length and location of basal bodies C- how the microtubules are fused to each other D- number, length and direction of force

Last Answer : number, length and direction of force

Cilia are distinguished from flagella (pronounced: fla-JEL-a) by their: a) arrangement of microtubules. b) length and number. c) function. d) color.

Description : Cilia are distinguished from flagella (pronounced: fla-JEL-a) by their: a) arrangement of microtubules. b) length and number. c) function. d) color. 

Last Answer : ANSWER: B -- LENGTH AND NUMBER.

the arrangement of pitches in a piece of twelve-tone music is called a(n) -General Knowledge

Description : the arrangement of pitches in a piece of twelve-tone music is called a(n) -General Knowledge

Last Answer : The arrangement of pitches in a piece of twelve-tone music is called a tone row.

What are the functions of microtubules? -Biology

Description : What are the functions of microtubules? -Biology

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What are the functions of microtubules? -Biology

Description : What are the functions of microtubules? -Biology

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When do microtubules attach to kinetochores? -Biology

Description : When do microtubules attach to kinetochores? -Biology

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When do microtubules attach to chromosomes? -Biology

Description : When do microtubules attach to chromosomes? -Biology

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When do microtubules attach to kinetochores? -Biology

Description : When do microtubules attach to kinetochores? -Biology

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When do microtubules attach to chromosomes? -Biology

Description : When do microtubules attach to chromosomes? -Biology

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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

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.

Microtubules and microfilaments are made from proteins that are shaped like?

Description : Microtubules and microfilaments are made from proteins that are shaped like?

Last Answer : Microtubules 50nm, make up the larger part of the cytoskeleton,and they are hollow, and larger. Microfilaments 8-10 nm aresmaller, they are in a double helix shape, different frommicrotubules.

What are microtubules ?

Description : What are microtubules ?

Last Answer : : Microtubules are involved in the division , secretion , intracellular transport and movement of flagella and cilia by the long , long and cylindrical organs present in the cell .

In what phase Microtubules push poles apart to elongate the cell?

Description : In what phase Microtubules push poles apart to elongate the cell?

Last Answer : Need answer

Vitamin A over dosage causes injury to (A) Mitochondria (B) Microtubules (C) Lysosomes (D) E.R

Description : Vitamin A over dosage causes injury to (A) Mitochondria (B) Microtubules (C) Lysosomes (D) E.R

Last Answer : Answer : C

The following points about microfilaments are true except (A) They form cytoskeleton with microtubules (B) They provide support and shape (C) They form intracellular conducting channels (D) They are involved in muscle cell contraction

Description : The following points about microfilaments are true except (A) They form cytoskeleton with microtubules (B) They provide support and shape (C) They form intracellular conducting channels (D) They are involved in muscle cell contraction

Last Answer : C

Consider the following statement: (1) In plant cells, cytokinesis start with the formation of the phragmoplast (2) Phragmoplast comprises intrazonal microtubules and Golgi vesicles (3) Primary cell wall is produced by microtubules (4) Phragmoplast is formed by nucleus

Description : Consider the following statement: (1) In plant cells, cytokinesis start with the formation of the phragmoplast (2) Phragmoplast comprises intrazonal microtubules and Golgi vesicles (3) Primary cell wall is produced by microtubules (4) Phragmoplast is formed by nucleus

Last Answer : Ans. ((a))

The activities of the cytoskeleton is dependent on which of the following types of filaments? a. Microtubules b. Intermediate filaments c. Actin filaments d. None of the above

Description : The activities of the cytoskeleton is dependent on which of the following types of filaments? a. Microtubules b. Intermediate filaments c. Actin filaments d. None of the above

Last Answer : Answer: a, b, c The cytoskeleton is a collection of filamentous protein structures that allow cells to assume and maintain a variety of shapes, to produce directed movement of ... activities depend upon three main types of filaments: actin filaments, intermediate filaments, and microtubules

What is an analogy for microtubules ?

Description : What is an analogy for microtubules ?

Last Answer : Microtubules have two main functions in cells and in doing so act like a skeleton as well as like railroadtracks. Microtubules are the main structural component of the cytoskeleton in cells, ... cytoplasm through transport proteins called kinesins and dyneins, which act much like railroad cars.

which substance are microtubules made ?

Description : which substance are microtubules made ?

Last Answer : In which structures and cellular processes do microtubules participate? Microtubules are made of consecutive dimers of the protein tubulin (each dimer has an alpha and a beta tubulin associated) ... also form the centrioles. Cytoskeleton and Cell Movement - Image Diversity: microtubules tubulin

Which of the following organelles is called 'Atom bombs'? (1) Microtubules (2) Nucleolus (3) Golgi bodies (4) Lysosome

Description : Which of the following organelles is called 'Atom bombs'? (1) Microtubules (2) Nucleolus (3) Golgi bodies (4) Lysosome

Last Answer : (4) Lysosome Explanation: Lysosomes are known by names such as suicidal bags/ atom bomb and House keeper / scavenger of cell. They are called suicide bags or atom bombs because if the single membrane surrounding the digestive enzyme breaks, the enzymes released may also destroy the cell itself.

Which of the following organelle lack membrane? (a) Mitochondria (b) Ribosomes (c) Microtubules(d) Peroxisomes

Description : Which of the following organelle lack membrane? (a) Mitochondria (b) Ribosomes (c) Microtubules(d) Peroxisomes

Last Answer : (b) Ribosomes

Which one is apparato reticolare? (a) Golgi apparatus (b) Endoplasmic reticulum (c) Microfilaments (d) Microtubules

Description : Which one is apparato reticolare? (a) Golgi apparatus (b) Endoplasmic reticulum (c) Microfilaments (d) Microtubules

Last Answer : (a) Golgi apparatus

Microtubules are absent in (a) mitochondria (b) flagella (c) spindle fibres (d) centrioles.

Description : Microtubules are absent in (a) mitochondria (b) flagella (c) spindle fibres (d) centrioles.

Last Answer : (a) mitochondria

Which of the following statements regarding cilia is not correct ? (a) Cilia contain an outer ring of nine doublet microtubules surrounding two singlet microtubules. (b) The organised beating of cilia is controlled by fluxes of Ca2+ across the membrane. (c) Cilia are hair-like cellular appendages. (d) Microtubules of cilia are composed of tubulin

Description : Which of the following statements regarding cilia is not correct ? (a) Cilia contain an outer ring of nine doublet microtubules surrounding two singlet microtubules. (b) The organised beating of ... (c) Cilia are hair-like cellular appendages. (d) Microtubules of cilia are composed of tubulin

Last Answer : (b) The organised beating of cilia is controlled by fluxes of Ca2+ across the membrane.

The solid linear cytoskeletal elements having a diameter of 6 nm and made up of a single type of monomer are known as (a) microtubules (b) microfilaments (c) intermediate filaments (d) lamins.

Description : The solid linear cytoskeletal elements having a diameter of 6 nm and made up of a single type of monomer are known as (a) microtubules (b) microfilaments (c) intermediate filaments (d) lamins.

Last Answer : (b) microfilaments

Nuclear envelope is a derivative of (a) microtubules (b) rough endoplasmic reticulum (c) smooth endoplasmic reticulum (d) membrane of Golgi complex.

Description : Nuclear envelope is a derivative of (a) microtubules (b) rough endoplasmic reticulum (c) smooth endoplasmic reticulum (d) membrane of Golgi complex.

Last Answer : (b) rough endoplasmic reticulum

Microtubules are the constituents of (a) centrioles, spindle fibres and chromatin (b) centrosome, nucleosome and centrioles (c) cilia, flagella and peroxisomes (d) spindle fibres, centrioles and cilia.

Description : Microtubules are the constituents of (a) centrioles, spindle fibres and chromatin (b) centrosome, nucleosome and centrioles (c) cilia, flagella and peroxisomes (d) spindle fibres, centrioles and cilia.

Last Answer : (d) spindle fibres, centrioles and cilia

By which of the following means antifungal chemotherapeutic agents may affect fungi? A- Interfere with nuclear division by preventing the aggregation of microtubules needed for mitosis B- Interfere with normal nucleic acid synthesisInterfere with ergosterol biosynthesis and thus alter the structure of the cytoplasmic C- membrane as well as the function of several membrane-bound enzymes like thoseinvolved in nutrient transport and chitin synthesis D- all of these

Description : By which of the following means antifungal chemotherapeutic agents may affect fungi? A- Interfere with nuclear division by preventing the aggregation of microtubules needed for mitosis B- ... membrane-bound enzymes like thoseinvolved in nutrient transport and chitin synthesis D- all of these

Last Answer : all of these

In animal cells, the assembly of spindle microtubules starts at the centrosome. What is another name for the centrosome?

Description : In animal cells, the assembly of spindle microtubules starts at the centrosome. What is another name for the centrosome?

Last Answer : •During prophase, assembly of spindle microtubules begins in the centrosome, the microtubule organizing center

The following cytotoxic drug acts by inhibiting depolymerization of tubulin and thus producing abnormal arrays of microtubules: A. Paclitaxel B. Vinblastine C. Etoposide D. Mitoxantrone (p. 774) 60.9 C 60.10 B 60.11 D 60.12 A Ai

Description : The following cytotoxic drug acts by inhibiting depolymerization of tubulin and thus producing abnormal arrays of microtubules: A. Paclitaxel B. Vinblastine C. Etoposide D. Mitoxantrone (p. 774) 60.9 C 60.10 B 60.11 D 60.12 A Ai

Last Answer : A. Paclitaxel

Vinca alkaloids exert antitumor activity by: A. Activating topoisomerase II to cause breaks in DNA strands B. Crosslinking DNA strands C. Inhibiting DNA mediated RNA synthesis D. Inhibiting polymerization of tubulin to form intracellular microtubules

Description : Vinca alkaloids exert antitumor activity by: A. Activating topoisomerase II to cause breaks in DNA strands B. Crosslinking DNA strands C. Inhibiting DNA mediated RNA synthesis D. Inhibiting polymerization of tubulin to form intracellular microtubules

Last Answer : D. Inhibiting polymerization of tubulin to form intracellular microtubules

The most probable mechanism of action of mebendazole is: A. Depolarization of membrane and spastic paralysis of the worm B. Hyperpolarization of membrane and flaccid paralysis of the worm C. Loss of intracellular microtubules and inhibition of glucose uptake in the worm D. Tegument damage and leakage of contents of the worm

Description : The most probable mechanism of action of mebendazole is: A. Depolarization of membrane and spastic paralysis of the worm B. Hyperpolarization of membrane and flaccid paralysis of the worm C. Loss of ... inhibition of glucose uptake in the worm D. Tegument damage and leakage of contents of the worm

Last Answer : C. Loss of intracellular microtubules and inhibition of glucose uptake in the worm

The polyene antibiotics act by: A. Inhibiting fungal cytochrome P450 enzyme B. Binding to ergosterol and creating micropores in fungal cell membrane C. Inhibiting fungal DNA synthesis D. Disorienting microtubules in fungal cells

Description : The polyene antibiotics act by: A. Inhibiting fungal cytochrome P450 enzyme B. Binding to ergosterol and creating micropores in fungal cell membrane C. Inhibiting fungal DNA synthesis D. Disorienting microtubules in fungal cells

Last Answer : B. Binding to ergosterol and creating micropores in fungal cell membrane

What is the function of proteins like microtubules and actin filaments?

Description : What is the function of proteins like microtubules and actin filaments?

Last Answer : Give structure to cells.

Endoskeleton of a cell is made up of (A) Microtubules (B) Microfilaments (C) Intermediate filaments (D) All of these

Description : Endoskeleton of a cell is made up of (A) Microtubules (B) Microfilaments (C) Intermediate filaments (D) All of these

Last Answer : (D) All of these

Which of the following are regularly assembled and disassembled during cell cycle. (A) Microtubules (B) Intermediate filaments (C) Both A and B (D) None of these

Description : Which of the following are regularly assembled and disassembled during cell cycle. (A) Microtubules (B) Intermediate filaments (C) Both A and B (D) None of these

Last Answer : (A) Microtubules

Microtubules consist of helically stacked molecules of the protein (A) Actin (B) Myosin (C) Keratin (D) Tubulin

Description : Microtubules consist of helically stacked molecules of the protein (A) Actin (B) Myosin (C) Keratin (D) Tubulin

Last Answer : (D) Tubulin

Which of the following organelles is called ‘Atom bombs’ ? (1) Microtubules (2) Nucleolus (3) Golgi bodies (4) Lysosome

Description : Which of the following organelles is called ‘Atom bombs’ ? (1) Microtubules (2) Nucleolus (3) Golgi bodies (4) Lysosome

Last Answer : Lysosome

A cross section at mid point of the middle piece of human sperm will show

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.

Jam nut is a locking device in which (A) A smaller nut is tightened against main nut creating friction at the contacting surface (B) A split pin is passed through diametrically opposite slots in nut and a hole in bolt and the two ends of split pin are separated and bent back on nut (C) A slot is cut in the middle of nut along the length and a cap screw is provided to tighten the two parts of nut separated by slot (D) An elastic piece is tightened in the nut by a setscrew

Description : Jam nut is a locking device in which (A) A smaller nut is tightened against main nut creating friction at the contacting surface (B) A split pin is passed through diametrically opposite slots in nut and ... parts of nut separated by slot (D) An elastic piece is tightened in the nut by a setscrew

Last Answer : (A) A smaller nut is tightened against main nut creating friction at the contacting surface

Castle nut is a locking device in which (A) A smaller nut is tightened against main nut creating friction at the contacting surface (B) A split pin is passed through diametrically opposite slots in nut and a hole in bolt and the two ends of split pin are separated and bent back on nut (C) A slot is cut in the middle of nut along the length and a cap screw is provided to tighten the two parts of nut separated by slot (D) An elastic piece is tightened in the nut by a setscrew

Description : Castle nut is a locking device in which (A) A smaller nut is tightened against main nut creating friction at the contacting surface (B) A split pin is passed through diametrically opposite slots in nut and ... of nut separated by slot (D) An elastic piece is tightened in the nut by a setscrew

Last Answer : (B) A split pin is passed through diametrically opposite slots in nut and a hole in bolt and the two ends of split pin are separated and bent back on nut

Fertilizin is a chemical substance produced from (a) polar bodies (b) middle piece of sperm (c) mature eggs (d) acrosome.

Description : Fertilizin is a chemical substance produced from (a) polar bodies (b) middle piece of sperm (c) mature eggs (d) acrosome.

Last Answer : (c) mature eggs

The middle piece of the sperm contains (a) proteins (b) mitochondria (c) centriole (d) nucleus.

Description : The middle piece of the sperm contains (a) proteins (b) mitochondria (c) centriole (d) nucleus.

Last Answer : (b) mitochondria

WRITE THE FUNTION OF EACH OF THE FOLLOWING: (a) MIDDLE PIECE OF HUMAN SPERM (b) LUTEINIZING HORMONE IN HUMAN MALES

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.

Arrangement of flagella in algae -Biology

Description : Arrangement of flagella in algae -Biology

Last Answer : answer:

Why is 'endarch' supposed to be the arrangement of stem and not roots ? -Biology

Description : Why is 'endarch' supposed to be the arrangement of stem and not roots ? -Biology

Last Answer : answer: