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Final exam for all Carbohydrate and Nitrogen lectures.
1. Which of the following complex carbohydrates can reduce the absorption of cholesterol inside the intestinal tract?
A. Glycogen
B. Soluble fibers
C. α-dextrins
D. Amylose
E. Amylopectin
2. What is the metabolic function of the intestinal cell membrane glycosidases?
A. Breaks down smaller carbohydrates into glucose, fructose and galactose.
B. Cleaves hydroxyl groups of dietary complex carbohydrates molecules.
C. Digests dietary complex carbohydrate in the mouth and the stomach.
D. Joins two simple sugars together to form complex carbohydrate molecules.
3. A patient's laboratory test is positive for fructose in urine only. All other blood test results are normal. There are no metabolic problems with this patient. Which of the following enzymes is deficient in this patient?
A. Aldolase B
B. Phosphoglucomutase
C. 4-Epimerase
D. Fructokinase
4. A patient's test results show hypoglycemia, liver failure, prolonged bleeding times and a positive urine test for fructose. Which of the following carbohydrate disorders is consistent with these lab results?
A. Fructosuria
B. Galactokinase Deficiency
C. Classical Galactosemia
D. Fructose Intolerance
5. What is the metabolic function of the two subunits of lactose synthase?
A. Lactalbumin synthesizes prolactin and galactosyltransferase synthesizes cortisol.
B. Lactalbumin synthesizes lactoglobulin and glycosyltransferase synthesizes casein.
C. Lactalbumin increases the catalytic rate of galactosyltransferase and galactosyltransferase synthesizes lactose.
D. Lactalbumin synthesizes colostrum and galactosyltransferase synthesizes mature milk.
E. Lactalbumin converts glucose to galactose and galactosyltransferase degrades galactose.
6. Which of the following enzymes is responsible for the rapid drug clearance of some barbiturates in the liver?
A. Debranching enzyme
B. Glycogen synthase
C. Aldose reductase
D. Lactose synthase
E. UDP-glucuronyltransferase
7. Which of the following statements directly explains the effects of hormones in the LIVER during fasting?
A. Cortisol stimulates insulin secretion in order to suppress the translocation of GLUT4.
B. Epinephrine binding to both alpha and beta receptors activates glycogen phosphorylase.
C. Epinephrine binding to beta receptors stimulates both glycogen and protein synthesis.
D. Epinephrine binding to alpha receptors helps inactivate glycogen phosphorylase.
E. Glucagon stimulates glycogenolysis via inositol-phospholipid signaling pathway.
8. Which of the following glucose transporters can facilitate the release of glucose, galactose and fructose from the intestinal cells into the hepatic portal vein?
9. Patients can develop cataracts from the build-up of sugar alcohols inside the lens of the eyes. Which of the following enzymes has the capability to synthesize sugar alcohols from either excess glucose or galactose?
A. Fructokinase
B. Galactokinase
C. Aldose reductase
D. Phosphoglucomutase
E. Glucose-6-phosphatase
10. Which of the following hormones stimulates the synthesis of α-lactalbumin?
A. Prolactin and cortisol
B. Glucagon and epinephrine
C. Estrogen and progesterone
D. Testosterone and aldosterone
E. Thyroid and human placental lactogen
11. A 6 year old boy’s exam and lab results show: hypoglycemia, jaundice, hemorrhage, hepatomegaly, and hyperuricemia. He is diagnosed with fructose intolerance. Which of the following hepatic enzymes is defective in this patient?
A. Galactokinase
B. Triose Kinase
C. Hexokinase
D. Aldolase B
E. Fructokinase
12. A 6 month old female is failing to thrive. Lab results show: hypoglycemia and hyperketonemia. She is diagnosed with Lewis' Disease. Which hepatic enzyme is defective in this patient?
A. Debranching enzyme
B. Glycogen phosphorylase
C. Branching enzyme
D. Glycogen synthase
E. Glucose-6-phosphatase
13. Andersen's and Cori's Disease are two glycogen disorders that produces hypoglycemia and altered branches of glycogen in both the fed and fasting states, respectively. In which of the following tissues can these disorders be the main cause for hypoglycemia?
A. Muscle
B. Liver
C. Intestines
D. Kidneys
E. Heart
14. A 7 day old full-term male is losing weight. He vomits and has diarrhea every time he ingests breast milk. Current lab results show: impaired liver function, hypergalactosemia, hyperchloremic metabolic acidosis, hyperaminoaciduria and high urinary galactitol levels. Which of the following defective enzymes would be consistent with this patient lab results?
A. Aldolase B
B. Galactokinase
C. Aldose reductase
D. UDP-glucuronyltransferase
E. Galactose-1-phosphate uridyltransferase
15. Which of the following digestive enzymes pairs can break peptide bonds at either the C-terminal or N-terminal end of a polypeptide?
A. Trypsin&chymotrypsin
B. Elastase&collagenase
C. Aminopeptidase and carboxypeptidase
D. Dipeptidase&tripeptidase
E. Enterokinase and Phospholipase A
16. Which of the following disorders WILL NOT cause a deficiency of essential amino acids due to either the lack of pancreatic digestive enzymes in the intestinal lumen or defective amino acid transporters?
A. Hartnup disease
B. Cystic fibrosis
C. Cystinuria
D. Pancreatitis
17. A patient is diagnosed with emphysema. Which of the following enzymes is responsible for the damage to the lungs?
A. Elastase
B. Collagenase
C. Carboxypeptidase
D. Chymotrypsin
E. Trypsin

Questions & Answers

how to know photocatalytic properties of tio2 nanoparticles...what to do now
Akash Reply
it is a goid question and i want to know the answer as well
Do somebody tell me a best nano engineering book for beginners?
s. Reply
what is fullerene does it is used to make bukky balls
Devang Reply
are you nano engineer ?
fullerene is a bucky ball aka Carbon 60 molecule. It was name by the architect Fuller. He design the geodesic dome. it resembles a soccer ball.
what is the actual application of fullerenes nowadays?
That is a great question Damian. best way to answer that question is to Google it. there are hundreds of applications for buck minister fullerenes, from medical to aerospace. you can also find plenty of research papers that will give you great detail on the potential applications of fullerenes.
what is the Synthesis, properties,and applications of carbon nano chemistry
Abhijith Reply
Mostly, they use nano carbon for electronics and for materials to be strengthened.
is Bucky paper clear?
so some one know about replacing silicon atom with phosphorous in semiconductors device?
s. Reply
Yeah, it is a pain to say the least. You basically have to heat the substarte up to around 1000 degrees celcius then pass phosphene gas over top of it, which is explosive and toxic by the way, under very low pressure.
Do you know which machine is used to that process?
how to fabricate graphene ink ?
for screen printed electrodes ?
What is lattice structure?
s. Reply
of graphene you mean?
or in general
in general
Graphene has a hexagonal structure
On having this app for quite a bit time, Haven't realised there's a chat room in it.
what is biological synthesis of nanoparticles
Sanket Reply
what's the easiest and fastest way to the synthesize AgNP?
Damian Reply
types of nano material
abeetha Reply
I start with an easy one. carbon nanotubes woven into a long filament like a string
many many of nanotubes
what is the k.e before it land
what is the function of carbon nanotubes?
I'm interested in nanotube
what is nanomaterials​ and their applications of sensors.
Ramkumar Reply
what is nano technology
Sravani Reply
what is system testing?
preparation of nanomaterial
Victor Reply
Yes, Nanotechnology has a very fast field of applications and their is always something new to do with it...
Himanshu Reply
good afternoon madam
what is system testing
what is the application of nanotechnology?
In this morden time nanotechnology used in many field . 1-Electronics-manufacturad IC ,RAM,MRAM,solar panel etc 2-Helth and Medical-Nanomedicine,Drug Dilivery for cancer treatment etc 3- Atomobile -MEMS, Coating on car etc. and may other field for details you can check at Google
anybody can imagine what will be happen after 100 years from now in nano tech world
after 100 year this will be not nanotechnology maybe this technology name will be change . maybe aftet 100 year . we work on electron lable practically about its properties and behaviour by the different instruments
name doesn't matter , whatever it will be change... I'm taking about effect on circumstances of the microscopic world
how hard could it be to apply nanotechnology against viral infections such HIV or Ebola?
silver nanoparticles could handle the job?
not now but maybe in future only AgNP maybe any other nanomaterials
I'm interested in Nanotube
this technology will not going on for the long time , so I'm thinking about femtotechnology 10^-15
can nanotechnology change the direction of the face of the world
Prasenjit Reply
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Source:  OpenStax, Biochemistry exercises. OpenStax CNX. Apr 06, 2016 Download for free at https://legacy.cnx.org/content/col11386/1.4
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