2. RNA interference helps in
a. Cell proliferation
b. Micropropagation
c. Cell defence
d. Cell differentiation

1 Answer

Answer :

Ans: Cell –defence.

Related questions

Description : 9. Which one of the following is a case of wrong matching ? (1) Callus - Unorganised mass of cells produced in tissue culture (2) Somatic hybridization - Fusion of two diverse cells (3) Vector DNA - Site for t-RNA synthesis (4) Micropropagation - In vitro production of plants in large number

Last Answer : Vector DNA - Site for t-RNA synthesis

Description : In human body, the cell growth and differentiation are highly controlled and regulated, but in cancer cells. (a) there is breakdown of these regulatory mechanism leading to formation of benign and malignant ... is mutated and produced in less amount (d) DNA is mutated and produced in less amount

Last Answer : Ans:(a)

Description : What is RNA interference? -Biology

Last Answer : answer:

Description : The process of RNA interference (RNAi) has been used in the development of plants resistant to (a) nematodes (b) fungi (c) viruses (d) insects.

Last Answer : (a) nematodes

Description : RNA interference involves (a) synthesis of cDNA and RNA using reverse transcriptase (b) silencing of specific mRNA due to complementary RNA (c) interference of RNA in synthesis of DNA (d) synthesis of mRNA from DNA

Last Answer : (b) silencing of specific mRNA due to complementary RNA

Description : 2. . Which among the following is not allowed to take place in the case of RNA interference employed in making tobacco plants resistant to the nematode, Meloidegyneincognitia? (a) Transcription of mRNA (b) Translation of mRNA (c) Replication of DNA (d) Maturation of hn RNA.

Last Answer : (b) Translation of mRNA

Description : Advantage of producing plants by micropropagation. -Biology

Last Answer : answer:

Description : A clone is a group of individuals obtained through – (1) Hybridisation (2) Micropropagation (3) Cross pollination (4) Self pollination

Last Answer : (2) Micropropagation Explanation: Micropropagation is the practice of rapidly multiplying stock plant material to produce a large number of progeny plants, using modern plant tissue cultore ... to accelerated growth compared to similar plants produced by conventional methods - like cuttings.

Description : Which one of the following is a case of wrong matching? (a) Somatic – Fusion of two hybridization diverse cells (b) Vector DNA – Site for tRNA synthesis (c) Micropropagation – In vitro production of plants in large numbers (d) Callus – Unorganised mass of cells produced in tissue culture

Last Answer : (b) Vector DNA – Site for tRNA synthesis

Description : The technique of obtaining large number of plantlets by tissue culture method is called (a) plantlet culture (b) organ culture (c) micropropagation (d) macropropagation.

Last Answer : (c) micropropagation

Description : Which part would be most suitable for raising virus-free plants for micropropagation ? (a) Bark (b) Vascular tissue (c) Meristem (d) Node

Last Answer : (c) Meristem

Description : Breeding of crops with high levels of minerals, vitamins and proteins is called (a) somatic hybridisation (b) biofortification (c) biomagnification (d) micropropagation.

Last Answer : (b) biofortification

Description : Which part would be most suitable for raising virus-free plants for micropropagation ? (1) Node (2) Bark (3) Vascular tissue (4) Meristem

Last Answer : (4) Meristem

Description : A clone is a group of individuals obtained through (1) Hybridisation (2) Micropropagation (3) Cross pollination (4) Self pollination

Last Answer : Micropropagation

Description : Which of the following phenomenon helps to conclude that light is a transverse wave? (1) interference (2) diffraction (3) polarization (4) refraction

Last Answer : (3) polarization Explanation: The phenomena of interference and diffraction of light were successful beyond doubt to prove that light is a form of wave. But they failed to decide whether light ... light is a transverse wave was established only after the discovery of the phenomenon of polarization.

Description : Companding helps in reducing __________ with respect to signal: (A) Interference (B) Signal overloading (C) Non linearity (D) Quantization noise

Last Answer : (D) Quantization noise

Description : Which of the following phenomenon helps to conclude that light is a transverse wave? (1) interference (2) diffraction (3) polarisation (4) refraction

Last Answer : polarisation

Description : Do you think the proliferation of cell phones has caused an increase or decrease in 'road rage'?

Last Answer : answer:I hate when I see someone talking on the phone while driving, or worse, texting while driving. Since the law went into effect making it illegal to use a handheld device while driving in Ontario it ... see a car swerve a little for no apparent reason, then see that the driver is on the phone.

Description : Which of the following statement(s) is/are true concerning the proliferative phase of wound healing? a. The macrophage is the predominant cell type b. The pink or purple-red appearance of a wound ... amino acids, hydroxyproline and hydroxylysine d. The predominant collagen type in a scar is type 3

Last Answer : Answer: b, c The proliferative phase of wound healing begins with the formation of a provisional matrix of fibrin and fibronectin as part of the initial clot formation. Initially, the provisional ... The principal collagen type scar is type 1, with lesser amounts of type 3 collagen also present

Description : Cytokines are endogenous signals that stimulate: A. Local cell proliferation within the wound. B. The central nervous system to initiate fever. C. The production of “acute-phase proteins.” D. Hypoferremia. E. Septic shock.

Last Answer : Answer:ABCD DISCUSSION: Although cytokines exert primarily autocrine and paracrine effects, they may also cause systemic effects

Description : All of the following statements concerning the actinomycetous filamentous soil bacterium Frankia are correct except that Frankia (a) can induce root nodules on many plant species (b) can fix ... its host plant through root hair deformation and stimulates cell proliferation in the host's cortex

Last Answer : (b) can fix nitrogen in the free-living state

Description : Actions of progesterone include the following except: A. Rise in body temperature B. Endometrial proliferation C. Proliferation of acini in mammary gland D. Suppression of cell mediated immunity

Last Answer : B. Endometrial proliferatio

Description : In many types of cancer, proteins that are crucial regulators of the cell cycle are often mutated and cannot function correctly. This leads to the evasion of apoptosis and to the loss of control of cell ... protein named p53. What is the normal function of p53 that is lost when it is mutated?

Last Answer : Normally, p53 senses DNA damage and acts as a transcription factor for checkpoint control genes.

Description : What is cell differentiation and why is it important? -Biology

Last Answer : answer:

Description : Preparation of cell differentiation are completed in-

Last Answer : Preparation of cell differentiation are completed in- A. Morula B. Blastula C. Gastrula D. Neurula

Description : Which of the following statement is correct? (1) The causal organism for foolish seedling disease is the source of gibberellin (2) Abscisic acid is a growth promoter (3) The ratio of auxin : cytokinin control cell differentiation (4) Bolting of cabbage can be induced by treatment with IAA

Last Answer : Ans. ((d))

Description : Colchicines bring about: (a) Polyploidy (b) Cell division (c) Cell elongation (d) Cell differentiation

Last Answer : Ans. ((a))

Description : Clonal selection includes a. Antigen-receptor binding on B cells. b. Antibody secretion recognizing same epitope as on B cell receptors. c. Differentiation of B cells into plasma cells and memory cells. d. All the above (A—C) are correct.

Last Answer : d. All the above (A—C) are correct.

Description : The term that is used to refer to a primitive cell, capable of selfreplication and differentiation, is a) stem cell. Stem cells may differentiate into myeloid or lymphoid stem cells. b) band ... blood cell without central pallor. d) reticulocyte. A reticulocyte is a slightly immature red blood cell.

Last Answer : a) stem cell. Stem cells may differentiate into myeloid or lymphoid stem cells.

Description : Isolation of cellular components to determine their chemical composition is called (A) Cell differentiation (B) Chromatography (C) Cell fractionation (D) All of these

Last Answer : (C) Cell fractionation

Description : Considering the massive vaccination effort, where is the uproar about the blatant proliferation of SOCIALIZED MEDICINE?

Last Answer : We have met the enemy - and he is us. I still want to know who benefits by spreading disinformation about vaccines. Epoch Times puts out all sorts of articles that, while sort of factual, distort the ... are Chinese. Maybe they and Russia are trying to use our freedom of the press to weaken the US.

Description : What has the proliferation of cameras and surveillance changed your mind on?

Last Answer : Streaking.

Description : What has the proliferation of cameras and surveillance changed your mind on?

Last Answer : Need Answer

Description : What has the proliferation of cameras and surveillance changed your mind on?

Last Answer : Streaking.

Description : What has the proliferation of cameras and surveillance changed your mind on?

Last Answer : Need Answer

Description : What has the proliferation of cameras and surveillance changed your mind on?

Last Answer : Streaking.

Description : What has the proliferation of cameras and surveillance changed your mind on?

Last Answer : Need Answer

Description : What has the proliferation of cameras and surveillance changed your mind on?

Last Answer : Streaking.

Description : What has the proliferation of cameras and surveillance changed your mind on?

Last Answer : Need Answer

Description : What has the proliferation of cameras and surveillance changed your mind on?

Last Answer : Streaking.

Description : What has the proliferation of cameras and surveillance changed your mind on?

Last Answer : Streaking.

Description : What has the proliferation of cameras and surveillance changed your mind on?

Last Answer : Need Answer

Description : What has the proliferation of cameras and surveillance changed your mind on?

Last Answer : Streaking.

Description : What has the proliferation of cameras and surveillance changed your mind on?

Last Answer : Need Answer

Last Answer : The countries that have agreed to abolish nuclear weapons are: France , United States and Britain

Description : Proliferation?

Last Answer : DefinitionProliferation is the growth of tissue cells. In many diseases, proliferation is abnormal. Cancer cells are very prolific -- they have high rates of cell division and growth.Information

Description : Which of the following statements regarding transforming growth factor b (TGF-b) are true? a. TGF-b expression is autoregulated b. TGF-b enhances collagen synthesis c. TGF-b inhibits extracellular matrix production d. TGF-b may inhibit or promote cellular proliferation

Last Answer : Answer: a, b, d TGF-b appears to be one of the key cytokines in control of tissue repair. TGF-b is strongly chemotactic for neutrophils, T cells, monocytes, and fibroblasts. ... TGF-b stimulates the proliferation of densely plated human marrow fibroblasts, but is inhibitory at high concentrations

Description : Reconstitution of the epithelial barrier (epithelialization) begins within hours of the initial injury. Which of the following statement(s) is/are true concerning the process of epithelialization? a. ... d. Visible scarring can occur only when the injury extends deeper than the superficial dermis

Last Answer : Answer: a, d The initial step of epithelialization involves epithelial cells from the basal layer of the wound edge flattening and migrating across the wound, completing wound coverage within 24- ... abrasions and burns may scar significantly. Whenever the dermis is incised, a scar will form

Description : Which of the following statement(s) is/are true concerning pharmacologic agents used to accelerate wound healing? a. A number of these agents are now currently approved for use in ... healing in chronic wounds d. Growth hormone functions by promoting fibroblast proliferation and collagen synthesis

Last Answer : Answer: b, c Currently there are no approved clinical agents that accelerate normal healing. Although a number of clinical trials are in progress, no agents are currently ... hormone administration significantly accelerates donor site healing, presumably due to its effects in minimizing catabolism

Description : Denervation super-sensitivity includes (a) Proliferation of receptors (b) Loss of mechanism for transmitter removal (c) Increased post-junctional responsiveness (d) All of the above

Last Answer : Ans: D