Communication, Homeostasis and Energy Quizzes - Biology Year 12

Question 1

Which of the following factors primarily influences the efficiency of energy conversion in various metabolic pathways?

Accepted Answer

Enzyme activity and substrate availability

Answer

Substrate availability only

Answer

Enzyme activity only

Answer

Environmental conditions only

Question 2

How do the nervous and endocrine systems work together to maintain homeostasis in humans?

Accepted Answer

The nervous system sends signals to the endocrine system, which releases hormones that affect specific cells.

Answer

The endocrine system controls the nervous system by releasing neurotransmitters.

Answer

The nervous and endocrine systems work separately to maintain homeostasis.

Question 3

What is homeostasis and why is it crucial for the survival of organisms?

Accepted Answer

Homeostasis is maintaining a stable internal environment despite external changes.

Answer

Homeostasis is how organisms communicate.

Answer

Homeostasis is how organisms get energy.

Answer

Homeostasis is not important for survival.

Question 4

How does biodiversity contribute to the development and effectiveness of adaptations for communication and homeostasis in ecosystems?

Accepted Answer

Biodiversity provides a diverse genetic pool, facilitating the evolution of varied adaptations for communication and homeostasis.

Answer

Adaptations for communication are independent of biodiversity, with organisms using universal signals to exchange information.

Answer

Homeostasis adaptations are solely determined by an organism's genetics, unaffected by the environment.

Answer

Biodiversity has a minimal impact on the effectiveness of adaptations for communication and homeostasis.

Question 5

How have organisms adapted their communication and homeostasis mechanisms to survive in extreme environments like deserts, polar regions, and deep-sea hydrothermal vents?

Accepted Answer

Desert organisms conserve water and use specialized signals for long-distance communication.

Accepted Answer

Polar organisms have thick insulation and huddle together for warmth.

Accepted Answer

Deep-sea hydrothermal vent organisms use bioluminescence for communication and have enzymes to withstand extreme conditions.

Answer

Extreme environment organisms have not evolved specific adaptations for communication or homeostasis.

Question 6

The primary role of the endocrine system is:

Accepted Answer

Maintaining internal balance (homeostasis)

Answer

Communication with external organisms

Answer

Nutrient acquisition and metabolism

Answer

Responding to external stimuli

Question 7

Which hormone regulates blood sugar levels?

Accepted Answer

Insulin

Answer

Glucagon

Answer

Epinephrine

Answer

Thyroxine

Question 8

The process by which plants convert light energy into chemical energy is called:

Accepted Answer

Photosynthesis

Answer

Glycolysis

Answer

Cellular respiration

Answer

Chemosynthesis

Question 9

Biotic factors in an ecosystem include:

Accepted Answer

Living organisms

Answer

Climate conditions

Answer

Soil chemistry

Answer

Water availability

Question 10

Sensory receptors that contribute to vision are:

Accepted Answer

Rods and cones

Answer

Hair cells

Answer

Taste buds

Answer

Olfactory bulbs

Question 11

The removal of nitrogenous waste from animal bodies is termed:

Accepted Answer

Excretion

Answer

Respiration

Answer

Digestion

Answer

Circulation

Question 12

The primary organ responsible for gas exchange in mammals is the:

Accepted Answer

Lungs

Answer

Heart

Answer

Kidneys

Answer

Intestines

Question 13

The main function of mitochondria is to:

Accepted Answer

Produce energy

Answer

Store genetic information

Answer

Synthesize proteins

Answer

Control cellular transport

Question 14

Homeostasis involves regulating physiological processes to maintain a:

Accepted Answer

Dynamic internal equilibrium

Answer

Steady decline

Answer

Rapid fluctuation

Answer

State of constant change

Question 15

Which hormone plays a primary role in regulating blood sugar levels?

Accepted Answer

Insulin

Answer

Thyroid hormone

Answer

Growth hormone

Answer

Estrogen

Question 16

The conversion of light energy into chemical energy in plants is a process known as:

Accepted Answer

Photosynthesis

Answer

Cellular respiration

Answer

Glycolysis

Answer

Fermentation

Question 17

Which characteristic is NOT attributed to enzymes?

Accepted Answer

Alteration as reactions progress

Answer

Protein composition

Answer

Acceleration of reactions

Answer

Specificity for specific substrates

Question 18

The primary function of the respiratory system is to facilitate:

Accepted Answer

Gas exchange

Answer

Nutrient absorption

Answer

Temperature regulation

Answer

Hormone production

Question 19

Which organ is responsible for producing and secreting bile?

Accepted Answer

Liver

Answer

Gallbladder

Answer

Pancreas

Answer

Stomach

Question 20

The loss of water vapor through plant stomata is referred to as:

Accepted Answer

Transpiration

Answer

Diffusion

Answer

Osmosis

Answer

Guttation

Question 21

A major waste product of human metabolism excreted by the kidneys is:

Accepted Answer

Urea

Answer

Creatinine

Answer

Ammonia

Answer

Bile

Question 22

Which of the following is NOT a component of a negative feedback loop?

Accepted Answer

Stimulus

Answer

Receptor

Answer

Effector

Answer

Response

Question 23

The process by which organisms convert light energy into chemical energy is called:

Accepted Answer

Photosynthesis

Answer

Respiration

Answer

Glycolysis

Answer

Fermentation

Question 24

The transmission of electrical impulses across a neuron is known as an:

Accepted Answer

Action potential

Answer

Diffusion

Answer

Osmosis

Answer

Synaptic transmission

Question 25

Which of the following is a function of the respiratory system?

Accepted Answer

Gas exchange

Answer

Temperature regulation

Answer

pH regulation

Answer

Nutrient absorption

Question 26

The process by which the body maintains a constant internal environment is called:

Accepted Answer

Homeostasis

Answer

Feedback

Answer

Regulation

Answer

Adaptation

Question 27

The molecule responsible for energy transfer in cells is:

Accepted Answer

ATP

Answer

Glucose

Answer

Glycogen

Answer

RNA

Question 28

Which system is responsible for coordinating body functions via hormones?

Accepted Answer

Endocrine system

Answer

Circulatory system

Answer

Digestive system

Answer

Nervous system

Question 29

Homeostasis is vital for organisms because it enables them to:

Accepted Answer

Maintain a stable internal environment despite external changes

Answer

Adapt to fluctuating environmental conditions promptly

Answer

Facilitate growth and development

Answer

Enhance reproductive capabilities

Question 30

Which of the following is an adaptation that enables organisms to conserve energy?

Accepted Answer

Hibernation

Answer

Camouflage

Answer

Migration

Answer

Mutualism

Question 31

The process of converting light energy into chemical energy is known as:

Accepted Answer

Photosynthesis

Answer

Cellular respiration

Answer

Chemosynthesis

Answer

Glycolysis

Question 32

Which hormone, secreted by the pancreas, regulates blood sugar levels?

Accepted Answer

Insulin

Answer

Adrenaline

Answer

Thyroid hormone

Answer

Estrogen

Question 33

What is the process by which plants utilize light energy to produce chemical energy called?

Accepted Answer

Photosynthesis

Answer

Respiration

Answer

Glycolysis

Answer

Krebs cycle

Question 34

Which factor does NOT affect the rate of chemical reactions catalyzed by enzymes?

Accepted Answer

Gravity

Answer

pH

Answer

Substrate concentration

Answer

Temperature

Question 35

Which type of cell signaling involves direct physical contact between cells?

Accepted Answer

Juxtacrine signaling

Answer

Endocrine signaling

Answer

Paracrine signaling

Answer

Autocrine signaling

Question 36

Plants have evolved adaptations to conserve water during water scarcity. Which adaptation helps plants to store water?

Accepted Answer

Development of succulent stems and leaves

Answer

Increased stomatal density

Answer

Production of drought-tolerant hormones

Answer

Reduced root growth

Question 37

What is a limitation of using controlled experiments to study communication and homeostasis in organisms?

Accepted Answer

Inability to observe natural behaviors in their entirety

Answer

Precise control of variables

Answer

Difficulty in replicating and comparing data

Answer

Limited ability to test hypotheses

Question 38

Which of the following functions is NOT attributed to the hypothalamus?

Accepted Answer

Storing memories

Answer

Regulating body temperature

Answer

Controlling hunger and thirst

Answer

Releasing hormones

Question 39

Which of the following is NOT a component of a negative feedback loop in homeostasis?

Accepted Answer

Positive feedback

Answer

Receptor

Answer

Control center

Answer

Effector

Question 40

Which hormone is primarily responsible for regulating blood glucose levels in humans?

Accepted Answer

Insulin

Answer

Glucagon

Answer

Epinephrine

Answer

Thyroxine

Question 41

What is the primary macromolecule that serves as the body's main source of energy?

Accepted Answer

Carbohydrates

Answer

Proteins

Answer

Fats

Answer

Nucleic acids

Question 42

Which characteristic distinguishes negative feedback mechanisms from positive feedback mechanisms?

Accepted Answer

Opposing the initial stimulus

Answer

Amplifying the initial stimulus

Answer

Maintaining the initial stimulus

Answer

Reversing the initial stimulus

Question 43

Which of the following is a primary function of the respiratory system in mammals?

Accepted Answer

Gas exchange

Answer

Nutrient absorption

Answer

Hormone production

Answer

Waste filtration

Question 44

Identify the cellular organelle responsible for generating most of the ATP used by the cell.

Accepted Answer

Mitochondria

Answer

Chloroplast

Answer

Ribosome

Answer

Golgi apparatus

Question 45

Which transport mechanism allows molecules to move across a cell membrane without energy input?

Accepted Answer

Diffusion

Answer

Osmosis

Answer

Active transport

Answer

Endocytosis

Question 46

Which branch of the nervous system is responsible for preparing the body for emergency situations?

Accepted Answer

Sympathetic nervous system

Answer

Parasympathetic nervous system

Answer

Central nervous system

Answer

Peripheral nervous system

Question 47

What is the role of the hypothalamus in homeostasis?

Accepted Answer

To regulate body temperature

Answer

To monitor blood pressure

Answer

To secrete hormones

Answer

To control heart rate

Question 48

Homeostasis refers to the:

Accepted Answer

Ability of an organism to maintain a stable internal environment

Answer

Ability of an organism to respond to external stimuli

Answer

Ability of an organism to obtain and use energy

Answer

Ability of an organism to communicate with other organisms

Question 49

Which of the following is an example of a negative feedback mechanism in the human body?

Accepted Answer

Decreased blood pressure in response to high blood pressure

Answer

Increased body temperature in response to cold

Answer

Increased heart rate in response to exercise

Answer

Stimulated digestion in response to nutrient intake

Question 50

Which hormone primarily regulates blood glucose levels?

Accepted Answer

Insulin

Answer

Glucagon

Answer

Adrenaline

Answer

Thyroid hormone

Question 51

The primary source of energy for most organisms is:

Accepted Answer

Carbohydrates

Answer

Lipids

Answer

Proteins

Answer

Nucleic acids

Question 52

Photosynthesis is the process by which plants and algae:

Accepted Answer

Convert sunlight into glucose

Answer

Convert glucose into energy

Answer

Break down waste products

Answer

Absorb nutrients from the soil

Question 53

Which organelle is responsible for protein synthesis?

Accepted Answer

Ribosome

Answer

Mitochondria

Answer

Chloroplast

Answer

Nucleus

Question 54

Which of the following is a fundamental process involved in maintaining a stable internal environment in organisms?

Accepted Answer

Maintaining a constant body temperature

Answer

Responding to external stimuli

Answer

Communicating with other organisms to coordinate behaviors

Answer

Seeking out food resources when energy levels are low

Question 55

Insulin, a hormone produced by the pancreas, plays a crucial role in regulating which physiological parameter?

Accepted Answer

Blood glucose levels

Answer

Blood pressure

Answer

Body temperature

Answer

Heart rate

Question 56

Which of the following mechanisms exemplifies a negative feedback loop, a common regulatory strategy in biological systems?

Accepted Answer

The regulation of body temperature through sweating to cool down

Answer

The dilation of pupils in response to darkness, allowing more light to enter

Answer

The release of adrenaline in response to stress, which increases heart rate, breathing, and blood pressure

Answer

The increase in blood clotting factors in response to a wound

Question 57

Which molecule serves as the main form of energy currency in living cells?

Accepted Answer

ATP

Answer

Glucose

Answer

ADP

Answer

NADH

Question 58

Which cellular structure is primarily responsible for protein synthesis?

Accepted Answer

Ribosome

Answer

Nucleus

Answer

Mitochondria

Answer

Golgi apparatus

Question 59

Which type of cell communication involves the release of chemical messengers that act on target cells at a distance?

Accepted Answer

Endocrine

Answer

Paracrine

Answer

Autocrine

Answer

Juxtacrine

Question 60

Which adaptation helps organisms conserve heat in cold environments?

Accepted Answer

Thick fur or feathers

Answer

Increased metabolic rate

Answer

Migration to warmer climates

Answer

Reduced surface area to volume ratio

Question 61

Which of the following is NOT a hormone associated with maintaining homeostasis?

Accepted Answer

Estrogen

Answer

Insulin

Answer

Epinephrine

Answer

Cortisol

Question 62

The process by which plants capture light energy to convert carbon dioxide and water to glucose is known as:

Accepted Answer

Photosynthesis

Answer

Respiration

Answer

Glycolysis

Answer

Fermentation

Question 63

Identify the characteristic feature of a negative feedback mechanism:

Accepted Answer

Diminishes the initial stimulus

Answer

Amplifies the initial stimulus

Answer

Unaffected by the initial stimulus

Answer

Reverses the effect of the initial stimulus

Question 64

Cellular respiration primarily relies on which energy-carrying molecule?

Accepted Answer

ATP

Answer

Glucose

Answer

Oxygen

Answer

Carbon dioxide