

 Biochemistry exercises

11. Which enzyme produces ammonium ions for the urea cycle? 
A. 
Oxidase 
B. 
Transaminase 
C. 
Aminotransferase 
D. 
Lactate dehydrogenase 
E. 
Glutamate dehydrogenase 
Match the term on the left with its biochemical function:
A. 
Process breaks down protein in the lysosomes as result of nutritional imbalances 
B. 
Process breaks down organelles and proteins into single amino acids 
C. 
Recognizes proteins with ubiquitin tails and feeds them into the 20S proteasome 
D. 
Facilitates the entrance of nonubiquitinidated proteins inside the 20S proteasome 
E. 
Shreds any size proteins into small peptides 
12. ____20S Proteasome 
13. ____Macroautophagy 
14. ____ChaperoneMediated autophagy 
15. ____19S regulatory cap 
16. ____11S regulatory cap 
17. Which of the following statements explains the concept of high protein, low carbohydrate diets? 
A. 
Increased in insulin levels induce both glycolysis and glycogenesis. 
B. 
Increased in glucagon levels stimulate lipolysis and boxidation of fats. 
C. 
Increased in cortisol levels activate glycogenolysis in muscle. 
D. 
Decreased in epinephrine levels enhance the rate of gluconeogenesis. 
E. 
Decreased in insulin levels open GLUT4 transporters in muscle. 
18. A 40year old woman suffers hematuria and consistent back pain on the left side. A 24hour urine sample was collected. Urine pH was acidic. Urine was positive for basic amino acids and had high levels of cystine. Microscopic urine examination showed the presence of translucent hexagonal crystals.
Which of the following disorders is consistent with these lab results? 
A. 
Hartnup disease 
B. 
Cystinuria 
C. 
Pancreatitis 
D. 
Emphysema 
E. 
Cystic fibrosis 
19. Which of the following high protein food products can be helpful in
both weight loss and providing essential amino acids to the body? 
A. 
Almonds 
B. 
Cashews 
C. 
Eggs 
D. 
Peanuts 
E. 
Red kidney beans 
A 21 year old 5' 5" tall female weighs 105 lbs. Her body mass index (
BMI ) is 17.5 and percent body fat is 10%. A normal
BMI for her height and weight is 18.5  25. A healthy % body fat is 21% to 33%. She has not had her menstrual period for the past four months. Her complaints are being fatigued, irritable and unable to concentrate. She constantly feels cold even in hot weather. She has a cough and is unable to get better.
Use this clinical case to answer questions 20 to 25.
20. She has an intense fear of becoming fat. She does 2 hours of high intensity exercise and a reduced calorie diet to stay thin. This patient consumes two slices of a Pizza Hut Medium Thin'N Crispy Pizza Cheese daily. Each slice of pizza has 230 calories per slice. A normal female, 18 to 35 years old, who neither leads a sedentary lifestyle, neither is overly active, should consume about 1760 calories daily. She feels a great sense of achievement by keeping herself trim and sees nothing wrong with consuming very small amount of calories in addition to her daily exercise workouts.In which nitrogen state is this patient right now? 
A. 
Positive 
B. 
Negative 
C. 
Balanced 
D. 
Intrinsic 
E. 
Extrinsic 
21. She enjoys drinking daily. Her drinking schedule consists of five to six 12ounces of beer for happy hour (Monday through Thursday). On the weekends, her alcohol consumption begins after 10 PM and continues until 2 AM. Her favorite drinks are: beers, malt liquor, vodka and tequila shots. She drinks in excess until she is in a drunken stupor or passes out.Which hepatic system will process the excess ethanol molecules in this patient? 
A. 
Alcohol dehydrogenase 
B. 
Lactate dehydrogenase 
C. 
Malate dehydrogenase 
D. 
Pyruvate decarboxylase 
E. 
Ubiquitinproteasome 
22. Which of the following molecules will cause dehydration and loss of electrolytes in this patient? 
A. 
VLDL particles 
B. 
Glycerol 
C. 
Lactic acid 
D. 
Ketone Bodies 
E. 
Acetaldehyde 
23. Which of the following byproducts of alcohol metabolism is the main source of fuel for the cells as a result of excess alcohol consumption in this patient? 
A. 
NADPH 
B. 
Ketone bodies 
C. 
Lactate 
D. 
Acetate 
E. 
Acetaldehyde 
24. Which of the following
IS NOT an effect associated with the metabolism of excess ethanol? 
A. 
Hyperlipidemia 
B. 
Metabolic acidosis 
C. 
Dehydration 
D. 
Overhydration 
E. 
Loss of electrolytes 
25. Which hepatic system synthesis will be induced as a result of daily excess ethanol consumption in this patient? 
A. 
Alcohol dehydrogenase 
B. 
Microsomal ethanol oxidizing 
C. 
UbiquitinProteasome 
D. 
Lysosomal Proteases 
E. 
Glucuronidation 
Questions & Answers
find the 15th term of the geometric sequince whose first is 18 and last term of 387
The given of f(x=x2. then what is the value of this f(3) 5f(x+1)
hmm well what is the answer
Abhi
how do they get the third part x = (32)5/4
can someone help me with some logarithmic and exponential equations.
sure. what is your question?
ninjadapaul
okay, so you have 6 raised to the power of 2. what is that part of your answer
ninjadapaul
I don't understand what the A with approx sign and the boxed x mean
ninjadapaul
it think it's written 20/(X6)^2
so it's 20 divided by X6 squared
Salomon
I'm not sure why it wrote it the other way
Salomon
ok. so take the square root of both sides, now you have plus or minus the square root of 20= x6
ninjadapaul
oops. ignore that.
ninjadapaul
so you not have an equal sign anywhere in the original equation?
ninjadapaul
is it a question of log
Abhi
I rally confuse this number And equations too I need exactly help
salma
But this is not salma it's Faiza live in lousvile Ky I garbage this so I am going collage with JCTC that the of the collage thank you my friends
salma
im all ears I need to learn
Sherica
right! what he said ⤴⤴⤴
Tamia
what is a good calculator for all algebra; would a Casio fx 260 work with all algebra equations? please name the cheapest, thanks.
algebra 2 Inequalities:If equation 2 = 0 it is an open set?
or infinite solutions?
Kim
The answer is neither. The function, 2 = 0 cannot exist. Hence, the function is undefined.
Al
if A not equal to 0 and order of A is n prove that adj (adj A = A
rolling four fair dice and getting an even number an all four dice
Differences Between Laspeyres and Paasche Indices
No. 7x 4y is simplified from 4x + (3y + 3x) 7y
how do you translate this in Algebraic Expressions
Need to simplify the expresin. 3/7 (x+y)1/7 (x1)=
. After 3 months on a diet, Lisa had lost 12% of her original weight. She lost 21 pounds. What was Lisa's original weight?
what's the easiest and fastest way to the synthesize AgNP?
I start with an easy one. carbon nanotubes woven into a long filament like a string
Porter
many many of nanotubes
Porter
what is the k.e before it land
Yasmin
what is the function of carbon nanotubes?
Cesar
I'm interested in nanotube
Uday
what is nanomaterials and their applications of sensors.
what is system testing?
AMJAD
preparation of nanomaterial
Yes, Nanotechnology has a very fast field of applications and their is always something new to do with it...
good afternoon madam
AMJAD
what is system testing
AMJAD
what is the application of nanotechnology?
Stotaw
In this morden time nanotechnology used in many field .
1Electronicsmanufacturad IC ,RAM,MRAM,solar panel etc
2Helth and MedicalNanomedicine,Drug Dilivery for cancer treatment etc
3 Atomobile MEMS, Coating on car etc.
and may other field for details you can check at Google
Azam
anybody can imagine what will be happen after 100 years from now in nano tech world
Prasenjit
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
Azam
name doesn't matter , whatever it will be change... I'm taking about effect on circumstances of the microscopic world
Prasenjit
how hard could it be to apply nanotechnology against viral infections such HIV or Ebola?
Damian
silver nanoparticles could handle the job?
Damian
not now but maybe in future only AgNP maybe any other nanomaterials
Azam
I'm interested in Nanotube
Uday
this technology will not going on for the long time , so I'm thinking about femtotechnology 10^15
Prasenjit
can nanotechnology change the direction of the face of the world
At high concentrations (>0.01 M), the relation between absorptivity coefficient and absorbance is no longer linear. This is due to the electrostatic interactions between the quantum dots in close proximity. If the concentration of the solution is high, another effect that is seen is the scattering of light from the large number of quantum dots. This assumption only works at low concentrations of the analyte. Presence of stray light.
the Beer law works very well for dilute solutions but fails for very high concentrations. why?
how did you get the value of 2000N.What calculations are needed to arrive at it
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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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