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WorksheetsBasics of Carbohydrates and Nucleic Acids
Total questions: 37
Worksheet time: 29mins
Made of the elements Carbon, Hydrogen, and Oxygen in a 1:2:1 ratio
Proteins
Carbohydrates
Lipids
Nucleic Acids are made of
CHO
CHON
CHONP
CHONS
A disaccharide is formed when an ionic bond known as a glycosidic linkage forms between two saccharide monomers.
True
False
Animals cannot break down cellulose because we only have the enzyme to hydrolyze alpha glucose, and cellulose is composed of beta glucose monomers.
Ture
False
What sugar is found in DNA?
Glucose
Ribose
Deoxyribose
Fructose
A structural carbohydrate in plants is
chitin
starch
cellulose
glycogen
Nucleic acids are the only non-nutritional category of biomolecules.
True
False
All epimers are diastereomers whereas all diastereomers are not epimers
True
False
Nothing can be said
Choose the odd one out
Enantiomers
Epimers
Diastereomers
Anomers
All monosaccharides are (a) sugars
(a) is the most abundant carbohydrate on Earth
The simplest carbohydrate is (a)
Polysaccharides have a definite molecular mass
True
False
A D-isomer of a given sugar may be d(+) or l(-) in nature
True
False
Choose the odd one out
Glucose
Galactose
Mannose
Fructose
Choose the odd one out
Thymine
Uracil
Cytosine
Adenine
Thymidine and deoxythymidine can be used interchangeably
True
False
Analysis of a sample of DNA found that 20% of the bases were adenine.
What percentage of the bases would be pyrimidines?
20
30
60
50
A strand of DNA contains 200 adenine bases, 20% of the total number of bases in the strand. How many phosphate groups does it contain?
200
400
800
1000
If 30% of the bases in a DNA molecule are adenine, what percentage of the bases are guanine?
20
30
40
60
Which technique was used to determine the double-helical structure of DNA?
Electrophoresis
Chromatography
Centrifugation
X-ray crystallography
What does Erwin Chargaff conclude?
A=G, C=T
A+T=C+G
A+G=T+C
A=C, G=T
A piece of DNA was analyzed and 15% of its nucleotides were adenine.
What percentage would be uracil?
0
15
30
35
Which nucleic acid, A – D, could contain the triplet of bases ACT?
DNA
mRNA
tRNA
rRNA
How many base pairs are there in one full turn of the DNA double helix?
4
10
16
64
Which one of these carbohydrates contains
1-6 glycosidic bonds?
Amylose
Amylopectin
Cellulose
Maltose
Which of the following molecules does not yield only α glucose molecules on complete hydrolysis?
Amylose
Glycogen
Maltose
Sucrose
What characteristic is shared by D-gulose and D-glucose?
Both are non-reducing sugars
Both contain a glycosidic bond
Both form pyranoses which are mirror images
Both have two anomeric forms
Number of asymmetric carbon atoms in glucose is:
One
Two
Three
Four
Beta 1-4 glycosidic bond is present in:
Maltose
Sucrose
Lactose
None of these
Number of stereoisomers of glucose is:
4
8
12
16
The predominant form of glucose in solution is:
Acyclic form
Hydrated acyclic form
Glucofuranose
Glucopyranose
In fructofuranose, the anomeric carbon is:
Carbon 1
Carbon 2
Carbon 5
Carbon 6
The following is an epimeric pair:
Glucose and fructose
Glucose and galactose
Galactose and mannose
Lactose and maltose
Alpha glycosidic bond is present in:
Lactose
Maltose
Sucrose
All of these
