Old exam Flashcards

(35 cards)

1
Q

T/F: Carbon can form a maximum of 6 covalent bonds

A

false

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

T/F: An organelle that is semi-autonomous can grow and divide independently.

A

True

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

T/F: Phospholipids can flip-flop across the membrane spontaneously; the process does not require the input of energy or enzyme activity

A

False; flippase requires ATP

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

T/F: As entropy increases, more energy is available to do work.

A

False

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

T/F: Facilitated diffusion is movement down a gradient with the aid of a transport protein

A

True

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

T/F: A reaction with a delta G>0 is endergonic and requires a net input of energy to proceed.

A

True

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

T/F: Photorespiration is advantageous when O2 levels are high, and CO2 levels are low.

A

False

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

T/F: A molecule that has been reduced has gained electrons, and is (usually) at a higher energy level.

A

True

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

T/F: Fermentation is much faster, but less efficient, at producing ATP compared to cellular respiration.

A

True

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

T/F: Photosynthesizing plants utilize the green wavelengths from the visible spectrum of light most efficiently.

A

False

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

Two molecules with identical molecular formulas but different structures are called _____.

A

isomers

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

The compartmentalization of areas within eukaryotic cells:

A

Allows them to perform several biochemical function simultaneously.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

Which membrane component is most important for allowing large, charged molecules to pass through the membrane?

A

Transmembrane proteins

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

Placing celery sticks in fresh water will make them more turgid and harder. This is because:

A

The celery is hypertonic to fresh water

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

The process that involves the selective uptake of a specific cargo molecule into the cell through receptor binding is

A

receptor-mediated endocytosis

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

Patients with Parkinson’s Disease have been shown to have a block in the movement of autophagosomes towards lysosomes. Predict a condition that could result from this defect:

A

An accumulation of old or damaged organelles

17
Q

A substance that binds with the active site of pyruvate dehydrogenase inhibiting the ability of the enzyme to bind with pyruvate is acting as a ____.

A

Competitive inhibitor

18
Q

_____ must consume organic molecules to live.

19
Q

A C4 plant minimizes photorespiration by:

A

Having the light reactions and carbon reactions occur in different cells, so oxygen does not come into contact with rubisco.

20
Q

Plants require a lot of water for transpiration, metabolism, and photosynthesis. How is water used in photosynthesis?

A

As an electron donor

21
Q

Located outside of the membrane-bound organelles, inside the plasma membrane.

22
Q

Provides cell shape, organization, and movement

23
Q

Site of photosynthesis

24
Q

Site of ATP synthesis

25
Site of modification, sorting, and secretion of lipids and proteins.
Golgi apparatus
26
Site of hydrogen peroxide breakdown
Peroxisome
27
Site of polypeptide synthesis
Ribosome
28
Where most genetic material is organized/expressed
Nucleus
29
Site of detoxification and lipid synthesis
Smooth ER
30
Site of protein sorting and secretion
Rough ER
31
Bilayer membranes are possible because of the properties of phospholipids, specifically because the HEAD region of a phospholipid is _________.
Hydrophilic
32
The tail region of a phospholipid is ________.
Hydrophobic
33
What are the three types of transporters? Directions of each?
Uniporter -- One molecule in one direction Symporter -- 2 molecules in same direction Antiporter -- 2 molecules in different direction
34
List the four major classes or organic molecules/macromolecules found in living organisms and example of each one.
Carbohydrates -- glucose Lipids -- triglycerides Nucleic acids -- DNA Proteins -- Amino acids
35
What is the difference between catabolic and anabolic?
Catabolic -- breakdown of large molecules | Anabolic -- Synthesis of large molecules