Comprehensive Biology Final

The word helix means spiral. What does this tell you about the structure of DNA, which is a double helix molecule?

• The nucleotides of the two strands bond together with spiral bonds.

• A double-stranded DNA molecule is composed of two linear strands that run opposite to each other, or anti-parallel, and twist together to resemble a twisted ladder.

• DNA is a double helix because it has two strands held together like a spiral staircase.

• Nucleotides are spiral-shaped molecules that bond together to form DNA.

During daytime, the rate of photosynthesis is faster than the rate of cellular respiration. A plant is placed in a clear, airtight container with a mechanism to allow its roots to get water. Will it be able to sustain itself?

• No, because the plant would need ATP to complete cellular respiration.

• No, because the plant would need oxygen to complete cellular respiration.

  
  

• Yes, because the amount of oxygen produced during the daytime would be enough to allow for

• Yes, because the amount of carbon dioxide produced during the daytime

Tags

NGSS.HS-LS1-5

NGSS.HS-LS1-7

NGSS.HS-LS2-5

Which of the following events in digestion and absorption is incorrect?

• Carbohydrate digestion begins in the mouth.

• Protein is primarily digested in the stomach.

• Fats are primarily digested in the small intestine.

• Digested carbohydrates, fat, and protein molecules are absorbed by the villi in the small intestine.

Tags

NGSS.MS-LS2-3

A reaction in which a water molecule is added to a large molecule in order to break it into multiple smaller molecules. Which type of reaction is described above?

• hydrolysis

• enzyme reaction

• catalysis

• dehydration synthesis

A lack of protein in the diet can cause hair loss. Which of the following statements explains why this occurs?

• Due to lack of protein in the diet, energy will be lost, leading to hair loss.

• Due to lack of protein in the diet, our body will not be able to form other proteins; it will conserve the protein it has for critical use, leading to hair loss.

• Lack of protein in the diet can weaken the immune system, leading to hair loss.

• Lack of protein in the diet will lead to breakage of disulfide bonds between proteins, leading to hair loss.

Tags

NGSS.HS-LS1-1

Which of the following includes all others on the list?

*

• Polysaccharide

• Disaccharide

• Carbohydrate

• Starch

Which of the following would most likely qualify as a macromolecule?

• DNA

• RNA

• Protein

• All of the above

Tags

NGSS.HS-LS1-1

NGSS.HS-LS1-6

This graph above shows the body temperature of an animal in various hours of the day. What can be said about this animal?

• The animal keeps its body temperature relatively constant.

• The animal is most active during the morning hours.

• The animal is more active when its body temperature is above 30°C.

• The animal is active at night.

Tags

NGSS.HS-LS1-3

Starch is a molecule that stores energy. When energy is needed, the starch molecules can be broken down quickly. This chemical reaction produces which of the following?

• Monosaccharides

• Lipids

• Proteins

• Amino acid chains

Tags

NGSS.MS-LS1-7

What phase of mitosis?

• anaphase

• prophse

• metaphase

• cytokinesis

Tags

NGSS.HS-LS1-4