BIO203H5 Final: Comprehensive lecture notes for lecture 2

Question; the carbon cycle is biologically important because

A. Carbon is a component of carbohydrates, fats, and proteins.

B. Carbon forms the framework for organic molecules essential to all organisms

C. Carbon is a major constituent of phospholipidis, ATP, and other energy storing molecules.

D. Photosynthesis by plants removes substantial amounts of atmosphere carbon

E. All of the above are correct

Which statement best describes an electron transfer chain?

a. ​It generates energy from carbohydrates.

b. It requires activation by oxygen.​

c. ​It is used by cells to dispose of excess electrons.

d. ​It utilizes ATP to synthesize nutrients.

e. ​It transfers energy, stepwise, from one compound to another.

Not present in most animal foods
Answer
carbohydrates
lipids
proteins
minerals
vitamins
water



Fiber is a type of ________ provided by ________.
Answer
fat, animals
carbohydrate, plants
protein, plants
carbohydrate, honey
protein, animals



Fiber is important in the diet in
Answer
providing glucose for cells.
stimulating movements of the large intestine.
assisting in fat digestion in the small intestine.
aiding absorption of fats in the small intestine.
providing essential amino acids.



Carbohydrates are typically broken down to
Answer
maltose, the molecule stored for future energy needs.
fructose, the molecule stored for future energy needs.
glucose, the molecule used as the energy source in cells.
glycogen, the molecule used as the energy source in cells.
glucose, the molecule stored for future energy needs.


A serving of food contains 9g carbohydrate, 3g protein, and 5g fat.The total Calories per serving of this food is ______.

73
83
93
103


Which of the following is an incorrect match?
Answer
trans fat - margarine
saturated fat - beef
unsaturated fat - olive oil
saturated fat - cold water fish
unsaturated fat - canola oil


Cholesterol can be synthesized by the body and is eaten in certainfoods.
True
False


When looking at a food label, in order to know how many caloriesyou will ingest, it is important to know total number of caloriesand
Answer
serving size.
% daily value of protein.
number of grams of fat.
number of grams of fiber.
% daily value of sodium.