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Biochem I > Final Exam > Flashcards

Final Exam Flashcards

1
Q

Pancreatic lipase digests lipids using which reaction mechanism?
Dehydration
Oxidation
Hydrolysis
Phosphorylation

A

Hydrolysis

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2
Q

Which functional group is most likely to hydrogen bond in a pure solution?
Hydroxyl
Phosphate
Ketone
Ether

A

Hydroxyl

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3
Q

Which macronutrient is most important for cell signaling?
Carbohydrates
Lipids
Proteins
Ethanol

A

Proteins

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4
Q

Which is not true regarding insulin?
a. Secreted from endocrine cells of pancreas
b. Peptide hormone
c. Communicates via paraceine signaling
d. Released when blood sugar is high

A

c. Because insulin communicates via hormone/endocrine signaling

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5
Q

The ____ structure of a protein will determine how it folds?
Primary
Secondary
Tertiary
Quaternary

A

Primary

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6
Q

COX has a Km of 8.7 mMol/L for arachidonic acid and a Km of 24.3 mMol/L for eicosapentaenoic acid. Which fatty acid does COX prefer?

A

Arachidonic acid

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7
Q

A ____inhibitor binds to the active site and changed the ____ of the enzyme?
a. Competitive, Vmaax
b. Competitive, Km
c. Noncompetitive, Vmax
d. Noncompetitive, Km

A

b.

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8
Q

The stress of finals week has made you shun your vegan lifestyle and embrace animal products. After a full blown bacon binge, your ____ will decrease cholesterol synthesis due to _____.
Gallbladder, enzyme reduction
Liver, enzyme induction
Gallbladder, feedback inhibition
Liver, feedback inhibition

A

d.

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9
Q

Thromboxane B3 is made from ____ in the ___ pathway

A

Eicosapentaenoic acid; COX

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10
Q

Which is an extra cellular lipid signal?
Estrogen
Phosphotidylinositol
Ceramide
Proteoglycans

A

Estrogen

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11
Q

Which membrane lipid contains a ceramide + glucose?
Ganglioside
Globoside
Glycoprotein
Cerebroside

A

Cerebroside

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12
Q

Which layer of the small intestine produces sucrase?

Serosa
Muscularis externa
Submucosa
Mucosa

A

Mucosa

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13
Q

Most macronutrient digestion occurs in the ___ due to enzymes secreted by the ____.

A

Duodenum, pancreas

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14
Q

Which digestive hormone stimulates release of HCL?

Gastrin
Secretin
CCK
GIP

A

Gastrin

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15
Q

Glycholate is found in ___ and is required for digestion of _____.

Pancreatic juice, proteins
Pancreatic juice, lipids
Bile, lipids
Bile, proteins

A

Bile, lipids

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16
Q

What is a storage form of lipids?

Adipose
Collagen
Glycogen
None of the above

A

Adipose

17
Q

Enzymes secreted from the ____ are lacking in your lactose intolerant patient

Mouth
Stomach
Pancreas
Brushborder

A

Brushborder

18
Q

Food allergies are caused by immune reactions to ___ in food.

Carbs
Proteins
Lipids
All of the above

A

Proteins

19
Q

Your patient presents with abdominal dissension and complains of gas and bloating. Which is most likely to be the cause?

A

Carbohydrate malabsorption leading to fermentation in the large intestine

20
Q

Which is an 18 carbon omega-6?

Arachidonic acid
Stearic acid
Linoleic acid
Alpha-linoleic acid

A

Linoleic acid

21
Q

Which lipid carrier contains mostly dietary triglycerides?

HDL
Chylomicrons
VLDL
LDL

A

Chylomicrons bc dietary means exogenous.

22
Q

Lipoprotein lipase is required for storage of _____.

Peptides
Glycogen
Triglycerides
Cholesterol

A

Triglycerides

23
Q

How is glucose absorbed?

A

Active transport

24
Q

How are Amino acids absorbed?

A

Active transport

25
Q

How is cholesterol absorbed?

A

Passive diffusion

26
Q

How is sucrose absorbed?

A

It’s not

Biochem I (1 decks)

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