Advertisement Upgrade to remove ads

Which organelle performs photosynthesis

Chloroplast

Which organelle peforms cellular respiration

Mitochondrion

Enzymes are:

Proteins

Which term best describes the sugar in a sugar-water solution?

Solute

Which of the following are found in the nucleus of an atom?

Neutrons and Protons

Sunlight is required for the synthesis of

Vitamin D

Activation energy is similar to the "push" needed to start rolling a stalled car down a hill. How do enzymes fit into this analogy?

Enzymes decrease the effort that's needed to start the car moving

When molecules or atoms move down a concentration gradient across cell membranes, it's called

Passive transport

Which pH represents an equal number of H+ and OH-ions?

7

Polysaccharides are polymers of

sugars

Which organelle is a stack of membranous sacs that are involved in sorting proteins to their proper cellular location?

Golgi apparatus

Because the electrons in a water molecule are shared unequally between hydrogen and oxygen, water is said to be

Polar

If an inductively reasoned hypothesis makes sense, based on all available and historical observations, then

the hypothesis might be false

Model organisms are used to test hypotheses

that are potentially too dangerous to perform on human subjects

The proteins that catalyze chemcial reactions in the body are called

Enzymes

Eating disorders in which the body is starved of calories are dangerous because

bone density can decrease, resulting in osteoporosis

The reactions of cellular respiration occur in the

matrix of the mitochondria

Protons have a charge and, collectively, give an element its

Positive, atomic number

Which of the following best describes the structure of the plasma membrane?

a double layer of lipids with proteins embedded in it

The role of insulin in the human body is to

trigger body cells to take up glucose

Imagine a balloon is made from a membrane that's permeable to water but not sucrose molecules. If the balloon is filled with a 50% sucrose solution and then placed in a beaker of water, then the balloon will

get larger as it gains water.

The atomic number of an element refers to the number of in one atom of that element

Protons

A deficiency of water in the body is called

dehydration

A decrease in the body's normal water level can cause all of the following problems Except

increased sweating

Which organelle is found in plant cells but not in animal cells?

chloroplast

Prokaryotes lack all the following Except a

cell wall

Prokaryotic cells are generally BLANK the size of eukaryotic cells

one-tenth

Mehran has heard from some of his teammates that drinking a high protein supplement after football training will improve his muscle mass. He decides to test his hypothesis by examining the effect of a high protein drink on some of his teammates compared with what happens with a control group who drink only water. Which of the following would be the best control for his experiment?

randomly selected teammates in training who are given a placebo instead of a protein drink

What is the pH of a neutral solution?

7

Imagine some table sugar dissolved in water. which term best describes the water?

Solvent

which structure is present in this cell but lacking in an animal cell?

cell wall

A news report is an example of a BLANK source of scientific information

secondary

Deductive reasoning is used to make BLANK based on a hypothesis

Predictions

Which macromolecule has a sugar-phosphate backbone?

Nucleic acid

The germ theory was developed by microbiologists, including

Pasteur and Koch

Which organelle contains digestive enzymes that degrade a variety of macromolecules?

lysosome

Which of the following is not associated with obsesity?

Type 1, insulin-dependent diabetes mellitus

An inifinite variety of enzymes and other proteins could be produced from the BLANK amino acids in the human body.

20

In science, an indivdual's personal experience or endorsement is considered

anecdotal evidence

Imagine a newly discovered biological molecule that is mostly hydrophobic in its structure. This new molecule will most likely be classified as a

lipid

If a drop of red food coloring is added to a glass of water, the red-colored molecules will

move from an area of high concentration of red-colored molecules to an area of low concentration

The BMI calculaton is

a measure of health risk based on height and weight

Diffusion is

the movement of molecules from an area of high concentration to an area of low concentration

When a hypothesis is extensively tested and supported by a large number of studies conducted by many different scientists, then

it is considered a scientific theory.

Which of the following is true regarding the BMI of healthy men and women?

Both healthy men and women have a BMI of at least 20 but less than 25

All the following are reasons we need water, EXCEPT that it

dissolve,carries, and stores Vitamins A,D,E, and K in the body

Why are whole foods better for your health than processed foods?

Processed foods don't contain all the vitamins and minerals found in whole foods.

Which organelle is represented by a network of membranes involved in the production of proteins?

chloroplast

The sampling error refers to the

differences between a group if experimental subjects and the population as a whole

Phagocytic white blood cells digest many of the invasive bacteria that gain entry into the human body. How could a bacterial cell enter a white blood cell in order to be digested?

facilitated diffusion

The most trustworthy source of scientific information is

peer-reviewed research publications

Shannon has considered herself an extremely healthy person for most of her life. She is a marathon runner and watches her diet very carefully. She has 8% body fat, weighs 105 pounds, and is 5'10. Shannon might not actually be a healthy as she thinks because she

doesnt have enough body fat for menstruation or pregnancy

Which of the following is NOT a macronutrient?

vitamins

A news report on CNN that describes recently published research on a new treatment for colds is an example of an

secondary source

An experimental result is called statistically significant when

the result is unlikely to be due to chance alone

Which feature is found in both prokaryotic and eukaryotic cells?

DNA

What kind of molecule form a bilayer that is basis for all cellular membranes?

phosopholipid

Marquisha is 5 foot 6 inches, weighs 155 pounds, and has a body fat percentage of 27%. Although she's not obese, she's doesn't fit the body image of the models in her magazines. How would biologists view Marquisha's health?

Her body fat percentage falls within fall within the ideal range for women, and she's not overweight.

Approximately one out of every BLANK Americans has a BMI greater than 30 and is considered BLANK

3; overweight

Vitamins in the human body

help enzymes function properly

Why is fiber an important part of a healthful human diet?

it may decrease the risk of certain types of cancers

All the following are signs that a website contains reliable scientific information EXCEPT that the site

it is set up to allow you to buy the product being described

What are the monomer "building blocks" that make up proteins?

Amino acids

How do the concentration of H+ and OH- compare to each other in an acidic solution?

The concentration of H+ is higher

During diffusion, solute molecules move

down a concentration gradient of solute molecules

Each of the following is a testable hypothesis EXCEPT

Being a good driver makes you less likely to catch a cold

Even though they're extremely small, viruses are too large to enter a cell by passive or active transport and thus must enter a host cell via

Endocytosis

Why is a very low level of body fat unhealthy in young women?

Women need a certain amount of fat to maintain their fertility

Which of the following is a true statement about the differences in fat and energy storage between average men and women?

Women store proportionally more fat in their breasts, hips, and thighs than men.

trans-fatty acids, which are common in fast food, are a concern to nutritionists because they

cant be digested by the human body and thus clog the arteries

There is a strong correlation between stress and suspectibility to colds. This means that

stress might or might not affect suspectibility to colds.

Please allow access to your computer’s microphone to use Voice Recording.

Having trouble? Click here for help.

We can’t access your microphone!

Click the icon above to update your browser permissions above and try again

Example:

Reload the page to try again!

Reload

Press Cmd-0 to reset your zoom

Press Ctrl-0 to reset your zoom

It looks like your browser might be zoomed in or out. Your browser needs to be zoomed to a normal size to record audio.

Please upgrade Flash or install Chrome
to use Voice Recording.

For more help, see our troubleshooting page.

Your microphone is muted

For help fixing this issue, see this FAQ.

Star this term

You can study starred terms together

NEW! Voice Recording

Create Set