1. Did you find similarities among the different bacterial cultures colony morphology?

2. What are some other ways to differentiate bacteria, if the the colony morphology is similar?

12. In simple diffusion a solute

A. Is propelled by random molecular motion

B. Moves up its concentration gradient

C. Moves across a membrane because of an input of free energy.

D. Both A and B are correct

E. All of the above are correct

16. Lipolysis is used to

A. Degrade triacylglycerols

B. Prepare triacylglycerols for excretion

C. Remove lipid from membrane

D. Cleave fatty acids into two carbon units

E. Convert fatty acids to glucose

19. The myelin sheath

A. Surrounds nerve cell axons

B. Contains large amounts of cardiolipin

C. Facilitates nerve impulse transmission

D. Both A and B are correct

E. Both A and C are correct

20. Membrane proteins are linked to anchor molecules through a ___________ link

A. Ether

B. Ester

C. Amide

D. Amino

E. Plasma

22. Patients with familial hypercholesterolemia

A. Possess depressed levels of plasma cholesterol

B. Have missing or defective LDL receptors

C. Are homozygous or heterozygous for a nonfunctional LDL receptor gene

D. Have very high levels of serum cholesterol

E. B, C and D are correct

3.

Which of the following microscopes would you use if you wanted to observe a living

Paramecium

from a drop of pond water?

a. compound light microscope

b. confocal microscope

c. stereo (dissecting) light microscope

d. scanning electron microscope

e. transmission electron microscope

4. Which of the following microscopes would you use if you wanted to observe a cross

section of an organelle such as a Golgi apparatus (the image would be black and white)?

a. compound light microscope

b. confocal microscope

c. stereo (dissecting) light microscope

d. scanning electron microscope

e. transmission electron microscope

5. Which of the following microscopes primarily uses a computer and laser to make three-dimensional images of a specimen?

a. compound light microscope

b. confocal microscope

c. stereo (dissecting) light microscope

d. scanning electron microscope

e. transmission electron microscope

6. Which of the following microscopes would you use if you wanted to observe the eye of a squid?

a. compound light microscope

b. confocal microscope

c. stereo (dissecting) light microscope

d. scanning electron microscope

e. transmission electron microscope

7. Which of the following microscopes would you use if you wanted to see fine detail on the surface of a pollen grain (the image would be black and white)?

a. compound light microscope

b. confocal microscope

c. stereo (dissecting) light microscope

d. scanning electron microscope

e. transmission electron microscope

8. You are using an electron microscope to view a cell that does not have organelles, does have DNA, a cell wall (composed of polysaccharides and proteins), cell membrane, cytoplasm and ribosomes. This type of cell can often be found in extreme environments. You are viewing a member of…

a. Kingdom Fungi

b. the protists

c. Kingdom Plantae

d. Kingdom Animalia

e. Domain Bacteria

f. Domain Archaea

9. You are using a compound light microscope to view a unicellular organism that does have organelles and is moving via pseudopodia. You are viewing a member of…

a. Kingdom Fungi

b. the protists

c. Kingdom Plantae

d. Kingdom Animalia

e. Domain Bacteria

f. Domain Archaea

2. Energy requiring transport mechanisms include

A. Primary active transport

B. Diffusion

C. Facilitated diffusion

D. Both A and B are correct

E. Both A and C are correct

3. The fixation of nitrogen requires _______.

A. Fe-Mo protein

B. Fe protein

C. Ferredoxin

D. Both A and B are correct

E. All of the above are correct

4. Membranes are rigid when they contain

A. Large amounts of cholesterol

B. Large amounts of unsaturated fatty acids

C. Large amounts of saturated fatty acids

D. Large amounts of water

E. A and B

5. Membrane remodeling

A. Requires phospholipases

B. Requires acyl transferases

C. Occurs only when cells are under stress

D. Both A and B are correct

E. All of the above are correct

7. Which of the following is not a function of lipids

A. Energy storage

B. Components of biological membranes

C. Insulation

D. Source of acetyl-CoA

E. All of the above are functions of lipids

What do we know now about the link between human diseases and gene mutations.

Thinking ahead to the remaining topics, what happens to histones bound to eukaryotic chromosomes before and during DNA replication and transcription?

Two purple sea slugs are mated with each other. Among their numerous offspring, 428 have a purple integument and 152 have orange integuments. With a chi-square test, compare the observed numbers with a 3:1 ratio and determine if the difference between observed and expected could be a result of chance.

There have been a number of studies indicating that schizophrenia is a complex genetic disorder. Which of the following observations are most consistent with this hypothesis? (select two answers)

Siblings of individuals with schizophrenia have an elevated risk of developing schizophrenia.

In monozygotic twins, if one twin has schizophrenia, it is very rare that the other is affected.

Malnutrition in utero and certain infections may increase risk of schizophrenia.

Schizophrenia follows an autosomal recessive inheritance pattern.

If you wanted to determine how many people were in your class, you would look around the room and count each individual. Even the smallest amounts of broth contain too many bacteria to count individually. To determine how many bacteria are in a given sample, microbiologists use a number of different methodologies including standard plate counts following serial dilutions, direct microscopic counts, determining the most probable number, using filtration followed by standard plate counts, measuring turbidity with a spectrophotometer, measuring the metabolic products of a population, and determining the dry weight of the cells in the culture. (1) Which of these methods are best to use to determine the number of viable cells? What do these methods have in common? (2) Which of these methods would you most likely use if you expected your density of cells to be very low? (3) Explain for which methodologies you might have to make a serial dilution and why dilutions may be necessary. (4) If you plated 1 ml of a 1:10,000 dilution and recovered an average of 27 colonies, how many cells per ml were there in the undiluted (stock) culture?

Can you pleasee answer these questions:

1. What are the mechanisms of tolerance used by resistant or engineered plants. Give an example.

2. What is the pesticidal crystal protein Bt.

3. What is Bt toxin mode of action, explain in detail.

Thank you in advance, I would appreciate it a lot, and I am grateful forever!!!

Discuss how the Human and Neanderthal OR1K1 proteins are similar and different including the implications on how this specific olfactory receptor may have functioned differently in Neanderthals compared to humans. Be sure to include the names of the amino acids that have changed and what impact you believe this change will have on the overall protein structure and function

BIOCHEM: Draw a Ramachandran plot for a 4-helix bundle protein.

*)Please walk me through how to draw the plot in detail if possible, as I really want to understand this concept well. Thank you!