Download Answer the following short questions Q 1

Question one
Multiple choice questions (MCQs)
Q1
The sum of all chemical and energy transformations that take place in the
organism is:
(a)
Anabolism
(b)
Metabolism
(c)
Catabolism
(d)
Non of the above
Answer
B
Q2
The phase of metabolism in which larger molecules are split into smaller
ones is :
(a) Catabolism
(b) Anabolisam
(c) Metabolism
(d) Non of the above
Answer
A
Q3
The glycolysis is the name given to the pathway involving the conversion
of:
(a) glycogen to glucose-6-phosphate
(b) glucose to pyruvate or lactate
(c) glycogen or glucose to fructose
(d) glucose or fatty acids to pyruvate or acetyl CoA
Answer
B
Q4
The conversion of one molecule of glucose to two molecules of pyruvate
results in the net formation of:
(a) six molecules of water
(b) two molecules of ATP
(c) three molecules of ATP
(d) thirty-eight molecules of ATP
Answer
B
Q5
The enzymes of citric acid cycle are located in the:
(a) mitochondrion
(b) nucleus
(c) cytoplasm
(d) lysosomes
Answer
A
Question
Read each sentence. Mark (T) if it is true. Mark (F) if it is false
Q1
Uridine diphosphate glucose (UDPG) can be formed directly from
UDP- galactose by the enzyme UDP-glucose 4-epimerase
Q2
The process of fatty acid biosynthesis shows several features
which distinguish it clearly from fatty acid oxidation, these include
the requirement for NADPH and biotin
Q3
The pentose phosphate pathway leads to the production of glucose
1-phosphate for glycogen synthesis
Q4
The pentose phosphate pathway includes two reversible oxidative
reactions followed by a series of reversible sugar phosphate
interconversions
Q5
The enzyme α-amylase if absent from the pancreatic secretion,
results in incomplete digestion of starch result in a large bacterial
population in the faeces and diarrhoea
T
T
F
F
T
Fill in the blanks
DNA is the information storage
mRNA is the information carrier
Protein is the information product
The monomeric units of nucleic acids are nucleotide
Nucleosides contain monosaccharide, D-ribose or 2-deoxy-D-ribose, linked to N-1 of
pyrimidine or N-9 of purines, by a o-glycosidic linkage
Each nucleotide contains nitrogen base, sugar and phosphate
DNA contains the purine bases: adenine, guanine and pyrimidine bases Thymine, Cytosine
RNA contains Uracil instead of thymine
In contrast to DNA which is organized into two strands, RNA is single strand structure
Three major types of RNA are mRNA, tRNA and rRNA all are involved in some aspects of
protein synthesis
DNA is the major store of heredity information which is copied into RNA molecules in a
process called transcription, proteins are then synthesized in a process involving the
translation of RNA
Q1
Below is a diagram showing the β-oxidation of fatty acid, Choose the most
appropriate answer of the following questions
Q1
What are the types of fatty acid:
(a) Saturated even noumber fatty acid
(b) Saturated odd numbere fatty acid
(c) Unsaturated even number fatty acid
Answer
A
Q2
How fatty acids are activated in preparation of oxidation?
(a) Fatty acid are activated to their coenzyme A derviative
(b) Fatty acid are activated to their coenzyme B derviative
(c) Fatty acid are activated to their coenzyme C derviative
Answer
A
Q3
Answer
What is the enzyme for this activation?
(a) Fatty acyl CoA synthease
(b) Fatty acyl CoA synthetase
(c) Fatty acid synthetase
B
Q4
What are the coenzymes nedded for fatty acid oxidation?
(a) FAD
(b) FAD and NAD
(c) NAD
Answer
B
Q5
What is the function of carnitine?
(a) transfers fatty acids from mitochondria to cytosol
(b) transfers amino acids from cytosol to mitochondria
(c) transfers fatty acids from cytosol to mitochondria
Answer
C
Q6
Where
(a)
(b)
(c)
Answer
C
Q7
Where
(a)
(b)
(c)
is β-oxidation taking place?
In cytosol
Ine doplasmic reticulum
In mitochondria
are the products during each cycle of β-oxidation of fatty acid?
Acetyl CoA
Acetyl CoA and FADH2
Acetyl CoA, FADH2 and NADH
Answer
C
Q8
What are the energy producing steps in β-oxidation pathway?
(a) Steps 1 and 2
(b) Steps 1 and 3
(c) Steps 2 and 3
Answer
B
Q9
β-oxidation of fatty acids involves a sequence of four reactions repeated several
times. This sequence is best described by:
(a) Oxidation, oxidation, hydration and cleavage
(b) Oxidation, hydration, oxidation and cleavage
(c) Oxidation, hydration, hydration and cleavage
Answer
B
Q 10
What are fate of acetyl CoA?
(a) Oxidation in citric acid cycle
(b) Cholesterol synthesis
(c) All of the above
Answer
C
Q 11
Number of β-oxidation cycles undergo a 16 carbon saturated fatty acid:
(a) 8
(b) 7
(c) 6
Answer
A
Q 12
The breakdown of the fatty acid CH3-CH2-CH2-CH2-CH2-CH2-CH2-CH2-CO2H via the
β-oxidation pathway would yield
(a) three mol acetyl units and one mol propionyl units
(b) four mol acetyl units and one mol propionyl units
(c) four mol acetyl units and one mol Co2 units
Answer
A
Q 13
How many ATPs are produced when palmitoyl-CoA, a 16 carbon saturated fatty acid
is oxidized completely to Co2 and H2O?
(a) 129
(b) 131
(c) 96
Q 14
The sequence of reactions below occurs, in the appropriate direction, in: -CH2-CH2↔ CH=CH- ↔ -CHOH-CH2- ↔ -COCH2
(a) fatty acid oxidation/biosynthesis
(b) the TCA cycle
(c) glycolysis
Answer
A
Answer
A
Answer the following short questions
Q1
Identify the deoxyribose, phosphate groups and different nitrogenous bases
nitrogenous bases
phosphate groups
deoxyribose
Adenine
cytosine
Guanine
Thymine
Q2
The figure shows two mechanisms by which an RNA polymerase can attach to its promoter.
Identify which mechanism is used by bacterial RNA polymerase and which is used by RNA
polymerase II of eukaryotes
A
B