BIOLOGY MCQs
100 Questions TextBook
1
Which of the following best describes the mean of a data set?
A
The most frequently occurring valueB
The middle value when data is orderedC
The sum of all values divided by the number of valuesD
The difference between the highest and lowest values2
If a data set has no repeated values, what is the mode?
B
The average of the data set3
In a bar chart, what does the height or length of each bar represent?
A
The total number of categoriesB
The value of the corresponding categoryC
The average of all valuesD
The difference between the highest and lowest values4
When constructing a bar chart, which axis usually represents the categories?
B
Horizontal axis (x-axis)C
Both axes equally represent the categoriesD
Neither axis represents the categories5
Biostatistics is a branch of statistics that applies statistical methods to what field?
6
According to the text, what is the first major use of biostatistics mentioned?
A
Analysing Biological DataC
Designing Experiments and Studies7
In a clinical trial, what do biostatisticians help determine to detect a significant effect?
C
The age of participantsD
The duration of the study8
Analysing the growth rates of plants under different environmental conditions is an example of which use of biostatistics?
A
Analysing Biological Data9
Interpreting the results of a survey on disease prevalence can guide what?
A
Public health interventions10
Predicting the spread of an infectious disease helps in planning what?
11
Which field uses biostatistics to study the distribution and determinants of health and diseases in populations?
12
In agricultural research, biostatistics helps in comparing the yield of what?
A
Different farming equipmentC
Different wheat varietiesD
Different water sources13
In a clinical trial, a new medication is often tested against what to determine its effectiveness?
C
A different disease treatment14
What is another name for the 'mean' of a data set?
B
The most frequent value15
What is the very first step to calculate the median of a data set?
B
Find the most frequent valueC
Arrange the data in ascending orderD
Divide by the number of values16
A data set with two modes is called what?
17
What is the primary purpose of a bar chart?
A
To show the relationship between two variablesB
To compare quantities of different categoriesC
To display data over timeD
To show parts of a whole18
To ensure a fair comparison, the bars in a bar chart should be of equal...?
19
For the data set 150, 160, 165, 155, 170, what is the mean height?
20
For the data set 150, 155, 160, 165, 170, what is the median?
21
For the data set 150, 155, 160, 165, what is the median?
22
What is the mode of the data set: 150, 160 (2), 165 (1), 155 (1)?
23
What is the term for a data set like 150, 160, 160, 155, 155, which has two modes?
24
In the plant survey example, which species had the highest number of plants?
25
In the plant survey example, how many plants did Species C have?
26
Statistical analysis of data on COVID-19 infection rates is an example of which field?
27
What is the correct formula for the mean?
A
Sum of Data Points - Number of Data PointsB
Sum of Data Points / Number of Data PointsC
Sum of Data Points * Number of Data PointsD
Number of Data Points / Sum of Data Points28
If the number of values (n) is odd, the median is the value at which position?
29
If a data set has an even number of values, the median is the average of the values at which positions?
C
the first and last position30
What is 'frequency' in the context of calculating the mode?
C
How many times a value appears31
A bar chart is what kind of representation of data?
32
Biostatistics helps identify genetic markers linked to diseases like...
A
Influenza and Common Cold33
What does 'interpreting the results in a meaningful way' help to do?
B
Guide public health interventionsC
Design a new experiment34
What must be done to the data before you can find the median?
C
It must be put in order35
A 'statistically significant' result means the outcome is...
B
Likely not due to chance36
What is the mode of the data set: 10, 20, 30, 40, 50?
37
If the data set is 5, 8, 12, 15, 20, what is the median?
38
What is the mean of the data set: 7, 8, 9, 10, 11?
39
In the bar chart example, what does the y-axis represent?
40
What is the second step in creating a bar chart after gathering data?
B
Arrange data into categories41
Which of these is NOT a major use of biostatistics mentioned in the text?
B
Analysing Biological Data42
The mean, median, and mode are measures that help to ____ and understand data sets.
43
The mode is particularly useful for what kind of data?
44
What is the first step to calculate the mode?
B
Count the frequency of each value45
In the data set of student heights (150, 160, 165, 155, 170), what is the range (difference between highest and lowest)?
46
The effectiveness of vaccines involves which type of methods?
47
The median is useful for understanding the middle value, especially with what kind of data?
48
In a bar chart, labeling each bar with its category name and value is done when?
49
Approximately how many kinds of organisms have biologists discovered and classified?
50
What factor does the biodiversity of a place NOT depend on?
51
Which regions generally have more biodiversity?
52
What is the main purpose of classification?
B
To divide organisms into groups based on similarities and differencesC
To study the habitat of organismsD
To count the number of organisms53
Which of the following is an aim of classification?
A
To determine the size of organismsB
To find the evolutionary relationships among organismsC
To observe the behavior of organismsD
To record the sounds of organisms54
The groups into which organisms are classified are known as what?
55
Who devised the Linnaean system of taxonomic ranks in 1735?
56
Which taxonomic rank was added to the Linnaean system in 1977?
57
What is the highest taxonomic rank?
58
Organisms are broadly classified into how many domains?
59
The domain Eukarya is divided into how many kingdoms?
60
In the classification of plants and fungi, what term is used instead of Phylum?
61
What is the lowest and most basic level of classification?
62
Who was the first person to classify organisms into two groups, plants and animals?
63
Which scholar described the characteristics of 350 species of animals and wrote about the life of ants?
C
Abu Usman Umer Al-Jahiz64
In the two-kingdom classification system, organisms that can prepare their own food are placed in which kingdom?
65
Which organism presented a problem for the two-kingdom system due to having both plant-like and animal-like characteristics?
66
Who proposed the third kingdom, Protista, in 1866?
67
In the three-kingdom system, where were fungi placed?
68
What is the key difference between fungi and plants?
B
Fungi have cellulose in their cell wallsC
Fungi are heterotrophs that absorb food69
The five-kingdom classification system was introduced by whom in 1969?
70
The five-kingdom system is based on cellular organization and what other factor?
71
Which kingdom was introduced in the five-kingdom system to accommodate prokaryotes?
72
The three-domain system, introduced by Carl Woese, divides prokaryotes into which two domains?
73
The cell wall of organisms in Domain Archaea is made of what?
D
Polypeptides and proteins74
Which organisms are known to live in extreme environments like hot springs and salt lakes?
75
The cell wall of bacteria is made of what substance?
76
Which domain includes all unicellular and multicellular eukaryotes?
77
Kingdom Protista includes organisms that are unicellular, colonial, or simple multicellular. What does 'simple multicellular' mean?
A
They have complex organsB
They do not have multicellular sex organsD
They form large colonies78
Plant-like protists are commonly called what?
79
The cell walls of fungus-like protists are made of what?
80
How do fungi obtain nutrients?
D
Absorption from decaying matter81
The cell wall of fungi is made of what polysaccharide?
82
Which of the following is a unicellular fungus?
83
What are the cell walls of plants made of?
84
Viruses are not included in the classification system because they are what?
85
A virus consists of a protein coat surrounding what?
C
Nucleic acid (DNA or RNA)86
Particles composed only of protein that can cause infectious diseases are called what?
87
Particles composed of circular RNA that cause diseases in plants are called what?
88
The system of giving a two-part scientific name to an organism is called what?
89
In binomial nomenclature, what does the first part of the scientific name represent?
90
What does the second part of the scientific name, 'sapiens' in *Homo sapiens*, represent?
91
Scientific names are taken from which language to avoid favoritism?
92
How should a scientific name be written when typed?
93
When a scientific name is handwritten, what is the rule?
B
It must be in capital lettersC
The two parts should be separately underlined94
The common name 'black bird' being used for both crow and raven illustrates a problem with common names. What is it?
A
They are too scientificB
They are hard to rememberC
One name can refer to multiple organisms95
The example of 'silver fish' not being a true fish demonstrates what about common names?
A
They have no scientific basisB
They are always accurateC
They are based on evolutionary historyD
They are the same in all languages96
What is the scientific name for humans?
D
*Drosophila melanogaster*97
Which of the following kingdoms belongs to the Domain Eukarya?
98
Which of the following is NOT a component of the plant cell wall's three layers?
99
The fluid-mosaic model describes the structure of the:
100
In eukaryotic cells, where are ribosomes assembled?
