A recA deletion mutant of A. vinelandii was constructed. This mutant was sensitive to DNA-damaging agents like UV rays, methyl methane sulfonate (MMS) and nalidixic acid and was deficient in homologous recombination.doi:10.1016/0165-1161(89)90137-4I. Kalina...
What is the kinetic energy of the emitted electrons when Cesium is exposed to UV rays of frequency1.9×1015Hz? Photoelectric Effect: The photoelectric effect describes the phenomenon wherein free electrons are "produced" through incident light. The photo...
What is the frequency of this form of UV light? 1. What is the wavelength of a photon, in nm, as it goes from n = 4.0 to n = 2? 2. Which of the following has the highest-energy photons? A. X-rays B. Ultraviolet C. Visible light D. Infrared 3. Heise Photons...
Which of the following options is not correct regarding the order of the frequency of electromagnetic radiation? ARadio waves < Microwaves < X-rays BGreen light < UV light <γ- radiationsCFar infrared > Radio waves > Cosmic rays DMicrowaves < Near infrared rays < UV raysSubmit...
What is the frequency of ultraviolet light that has a wavelength of 338.3 nm? What is the wavelength of ultraviolet rays of 3.0 \times 10^{15} Hz frequency? (a) What is the frequency of a photon of UV radiation (\lambda = 2.00 \times ...
Short bursts of time in the sun help the body to naturally produce vitamin D. The UV rays from sunlight stimulate vitaminDsynthesis,which in turn supports calcium absorption to form and maintain strong bones. health.herbalife.co.in health.herbalife.co.in ...
C≤ Infrared waves D≥ UV raysSubmit What is the frequency of a 20 m radiowave? Aa.15MHz Bb.12MHz Cc.1200 KHz Dd.25 MHzSubmit The AM range of radiowaves have frequency Aless than 30 MHz Bmore than 30 MHz Cless than 20000 HZ Dmore than 20000 HZSubmitFor...
Our body makes less collagen with advancing age. Say, in mid to late 20s, the body stops producing as much as it used to. The levels begin to drop by 1-2% each year. This affects skin's structural integrity. Exposure to the sun's UV rays and smoking also contribute to compromising ...
Are infrared rays ionizing radiation? What is the electromagnetic radiation spectrum? Which type of electromagnetic radiation has the longest wavelength? The longest wavelength within the visible spectrum is what light? What type of ionizing radiation has the highest energy? What are the approximate ...
Skin chronic exposure to ultraviolet (UV) rays is clinically evidenced by dermatologic examination, and it is expressed by tissue pigmentation and constitution of wrinkles (mainly due to loss of elasticity); histopathologi- cal investigation shows a degenerative process represented by elastosis, tissue ...