The mass number of a nucleus is (a) Always less than its atomic number (b) Always more than its atomic number (c) Sometimes more than and sometimes equal to its atomic number (d) None of the above
2 26489The maximum KE of the photoelectron emitted from a surface is dependent on (a) The intensity of incident radiation (b) The potential of the collector electrode (c) The frequency of incident radiation (d) The angle of incidence of radiation of the surface
1 3402Which of the following is not an essential condition for interference (a) The two interfering waves must be propagated in almost the same direction or the two interfering waves must intersect at a very small angle (b) The waves must have the same time period and wavelength (c) Amplitude of the two waves should be the same (d) The interfering beams of light must originate from the same source.
2 6096When X-Ray photons collide with electrons (a) They slow down (b) Their mass increases (c) Their wave length increases (d) Their energy decreases.
1 5928An electron emits energy (a) Because its in orbit (b) When it jumps from one energy level to another (c) Electrons are attracted towards the nucleus (d) The electrostatic force is insufficient to hold the electrons in orbits.
1 2613In a balanced chemical equation (a) Atoms are conserved (b) Molecules are conserved (c) Moles are conserved (d) Reactant and product molecules are preserved.
1 21884How many grams of NaOH will react with 0.2 equivalent of HCl? (a) 0.59 (b) 0.285 (c) 1.18 (d) none of these.
2 5181Which of the following is least acidic (a) Ortho-cresol (b) Para-cresol (c) Phenol (d) Meta-cresol.
1 3681In Reimer-Tiemann?s reaction, the reaction intermediate is (a) Carbene (b) Dichloro carbene (c) Carbonion (d) Carbonium ion.
1 11139A catalyst (a)always slows down the reaction (b)always starts a rection that would not have ocurred at all otherwise (c)causes changes in the rate of the reaction (d)changes the quantities of the products formed.
1 2893The rate of the first order reaction depends on the (a) Concentration of the reactant (b) Concentration of the product (c) Time (d) Temperature.
1 2815Post New Bio Informatics Questions
What is a DNA array?
How to find a sequence of dna molecule?
Bootstrap analysis evaluates evolutionary trees by sampling columns from the original alignment with replacement (multiplying or removing some of them) and computing a proportion of times that a particular branch appears in the resulting trees. What is the main idea behind this approach?
Integrate 3x + 5 / (x3-x2-x+1)?
Suppose the Blast search returned 100 hits. Of these, 17 were false positives and we knew that there were 165 sequences in the database which should have returned a hit with our sequence. How many false negatives were there, and what is the sensitivity and selectivity of Blast in this instance?
What is enzyme-ligand interaction?
Will the plant able to produce electricity when the soil is dried up
Draw the E-R diagram for the database of a departmental store having the following relational database scheme Employees(e-no, address) Department(d-name) work-n(e-no, d-name) Looking-after(d-name, e-no) Item (item-no, brand-name, model-no, cost-price, sale-price)
what is a qi number?
How to caculate coordinates of each atoms on 3 D HP model?
Have the proteins of a family generally acquired distinctive properties within each of these three kingdoms for ancient families that arose before bacteria, archaea and eukaryotes diverged?
NLO : RPS : : ? : ZXA
Can DeCypher be used for protein struc-ture modeling?
How do you customize database for blast?
Describe the aim of microarray data analysis?