Suppose a student writes the days of the week on identical pieces of paper. She mixes them in in a bowl and selects one at a time. What is the probability that the day she selects will have the letter r in it?
Anonymous Quiz
14%
2/7
33%
1/7
48%
3/7
4%
4/7
A pair of dice are rolled. What is the probability that the sum of the numbers on the upper faces is greater than 9 and even?
Anonymous Quiz
29%
1/9
30%
5/9
34%
2/9
7%
7/9
❤2
Which of the following is NOT true about enzymes?
Anonymous Quiz
6%
They are a biological catalysts.
14%
They are proteins made up of chains of amino acids linked together by peptide bonds.
17%
Enzymes are denatured by high heat and high salt concentrations.
63%
Enzymes affect the nature of products formed.
❤3
It is the process of breaking the intra and unter-molecular non-covalent bonds that distrot the shape and active site of the enzymes. Which enzyme propertie shows the above statement?
Anonymous Quiz
7%
Solubility
17%
The colloidal
60%
Denaturation
16%
Enzyme precipitation
Which of the following is the 2nd stage of cellular respiration?
Anonymous Quiz
24%
Krebs cycle
19%
Oxidation phosphorylation
53%
Link reaction
4%
Glycolysis
❤2
Which of the following is an absolute measure of dispersion?
Anonymous Quiz
34%
Mean deviation
13%
Coefficient of range
29%
Coefficient of mean deviation
25%
Mean, mode and median
Consider the following data set: 22, 23, 24, 24, 25, 25, 26, 26, 27, 28. Then what is the inter-quartile(IQR) of the given data?
Anonymous Quiz
25%
6
39%
4
29%
2
7%
3
What is the mean deviation about the mode of the data set 12, 15, 12, 7, 10, 12, 9?
Anonymous Quiz
21%
12
46%
1.86
29%
3.54
5%
4.18
The largest L and the smallest S values of gross income of two companies (in Birr) are given below: Company 1: S = 1000 and L = 43200. Company 2: S= 1200 and L = 36000. Then which of the following is Not true about the two companies?
Anonymous Quiz
15%
Company 2 is more variable than 1.
38%
Company 2 is more consistent than 2.
38%
The coefficient range of company 1 is greater than 2.
10%
Company 1 is more variable than 2.
Consider the following data set: 11, 8, 7, 13, 12, 14, 15, 17, 20, 16, 19. Then which of the following is true about their distribution?
Anonymous Quiz
20%
The distribution is negatively skewed.
39%
The distribution is positivity skewed.
22%
The distribution is symmetrical.
19%
We can't determine from the given information.
.Which of the following best describes the function of the Smooth Endoplasmic Reticulum?
Anonymous Quiz
17%
Protein synthesis
12%
ATP production
9%
Photosynthesis
63%
Lipid synthesis and detoxification
❤3
In Mendelian genetics, if a heterozygous tall plant (Tt) is crossed with a homozygous short plant (tt), what is the phenotypic ratio of the offspring?
Anonymous Quiz
18%
3:1
47%
1:1
22%
9:3:3:1
12%
1:2:1
❤1
In an ecosystem, the organisms that convert solar energy into chemical energy are called:
Anonymous Quiz
8%
Consumers
25%
Decomposers
61%
Producers
7%
Scavengers
🙏1
Although the doctor has warned him several times, he hasn't stopped ________yet.
Anonymous Quiz
20%
to drink
12%
drinks
55%
drinking
13%
to get drunk
❤1
For commercial purpose, the basic production method of nitric acid(HNO3) is known as __.
Anonymous Quiz
16%
Haber process
73%
Ostwald process
6%
Contact process
5%
Solvay process
❤2
Consider the following steps:
Step1: burning of sulphur.
Step2: passing SO3 to sulphuric acid. Step3: addition of water to oleum. Step4: conversation of SO2 to SO3. Which of the following is the correct sequence involved during the production of H2SO4?
Step1: burning of sulphur.
Step2: passing SO3 to sulphuric acid. Step3: addition of water to oleum. Step4: conversation of SO2 to SO3. Which of the following is the correct sequence involved during the production of H2SO4?
Anonymous Quiz
48%
Step1 --> step4-->step2-->step3.
20%
Step1-->step2-->step3-->step4.
18%
Step2-->step3-->step4-->step1.
14%
Step4-->step2-->step1-->step3
All of the following processes are used to manufacture sodium hydroxide except___________.
Anonymous Quiz
15%
Castner- Kellner process
21%
Nelson Diaphragm cell
11%
Loewig's process
54%
Solvay process
Which of the following glass is made by heating a mixture of silica, sodium carbonate or sodium sulphate and limestone?
Anonymous Quiz
12%
Quartz glass
68%
Soda-lime glass
14%
Borosilicate glass
5%
Pyrex glass