Category 4

Multiple Choice

Which biomolecule is your cells first source for quick energy?

• Nucleic Acid
• Protein
• Lipid
• Carbohydrate

Multiple Choice

Enzymes are considered to be 

• Lipids
• Carbohydrate
• Protein
• Nucleic Acid

Multiple Choice

Which of the following molecules make up the basic structure of a cell membrane?

• waxes
• steroids
• fatty acids
• phospholipids

Multiple Choice

What is the purpose  of an enzyme?

• give permission for the reaction
• raise activation energy
• speed up reactions
• control how many reactions occur

Multiple Choice

Enzymes are capable of increasing the rate of a chemical reaction within a living cell.  Enzymes accomplish this through which of the following means?

• reducing the number of products   
• reducing the activation energy

Multiple Choice

Letter B...

• active site
• enzyme
• substrate
• products

Multiple Choice

Significantly changing the pH the enzyme is exposed to will cause the enzyme to _____________.

• increase enzymatic action 
• fit better with the substrate 
• denature 
• evaporate

Multiple Choice

The reactants of photosynthesis are

• sugar and water.
• sugar and oxygen.
• carbon dioxide and water.
• carbon dioxide and oxygen.

Multiple Choice

What are the products of photosynthesis?

• Carbon dioxide and water
• Carbon dioxide and oxygen
• Glucose and oxygen
• Glucose and water

Multiple Choice

Which gas is removed from the atmosphere during photosynthesis?

• hydrogen
• oxygen
• nitrogen
• carbon dioxide

Multiple Choice

What is the purpose of photosynthesis?

• make glucose
• make ATP
• make light
• release carbon dioxide

Multiple Choice

What are the reactants in the equation for cellular respiration?

• oxygen and lactic acid
• carbon dioxide and water
• glucose and oxygen
• water and glucose

Multiple Choice

What is cellular respiration?

• the breakdown of glucose  to release ATP
• the breakdown of glucose to release NADH
• the breakdown of glucose to release FADH
• the breakdown of glucose to release carbon

Multiple Choice

Which human body systems are directly involved in the reflex actions, such as knee jerking, blinking, and jumping when startled?

• Circulatory and respiratory
• Digestive and excretory
• Nervous and muscular
• Skeletal and circulatory

Multiple Choice

When you are dehydrated, the hypothalamus and pituitary gland release a hormone into the bloodstream that causes the kidneys to put less water into the urine. Which organ systems interact during this action?

• Circulatory - Integumentary - Reproductive
• Endocrine - Circulatory - Excretory
• Excretory - Reproductive - Nervous
• Muscular - Endocrine - Respiratory

Multiple Choice

What two human systems work together to provide body cells with a constant supply of oxygen while removing carbon dioxide waste products?

• Nervous and endocrine
• Muscular and skeletal
• Respiratory and circulatory
• Excretory and integumentary

Multiple Choice

Which correctly describes an interaction between two body systems of a rabbit that helps the rabbit outrun a pursuing coyote?

• The skeletal system releases additional calcium, and the circulatory system retains more sodium in the blood to provide muscles with ions for contraction.
• The digestive system increases the rate of digestion, and the excretory system ceases to provide tissues with more nutrients.
• The respiratory system increases the breathing rate, and the circulatory system increases blood pressure to provide tissues with more oxygen.
• The endocrine system releases hormones that prepare the immune system to deal with possible injuries.

Multiple Choice

What is the function of the phloem? 

• to move water down from the leaves 
• to move nutrients down from the leaves 
• to move spores down from the leaves 
• to move food down from the leaves 

Multiple Choice

A vine plant brushes against a fence and wraps itself around the fence. To what response is the stimulus is the plant responding to?

• phototropism

• gravitropism

• hydrotropism

• thigmotropism

Multiple Choice

___ respond to presence or absence of water by inflating or deflating which in turn opens and closes the stomata.

• Guard cells

• Xylem

• Roots

• Phloem

Multiple Choice

A student carried out an investigation about phototropism. The diagram illustrates the results. Which hypothesis would be supported by the observed results shown?

• Auxins inhibit plant growth.
• Auxins regulate branching in plants.
• Auxins regulate plant growth in response to gravity.
• Auxins are transported to shaded areas, stimulating cell elongation.

Multiple Choice

Water and minerals move through vascular tissue known as what?

• phloem
• xylem
• root hairs
• stomata