Q: Which of the following best describes the flow of genetic information in a cell?

$$\text{DNA} \rightarrow \text{RNA} \rightarrow \text{Protein}$$

Question 1

Which of the following best describes the difference between the domains Bacteria and Archaea?

Accepted Answer

Bacteria and Archaea both have simple cells, but Archaea are adapted to extreme environments such as salty lakes and hot springs.

Question 2

A scientist is studying a new organism found in a volcanic hot spring. The organism is unicellular, lacks a nucleus, and thrives in high temperatures. To which domain does this organism most likely belong?

Accepted Answer

Archaea

Question 3

Which of the following correctly lists the hierarchy of biological organization from largest to smallest?

Accepted Answer

Biosphere $$\rightarrow$$ Ecosystem $$\rightarrow$$ Community $$\rightarrow$$ Population $$\rightarrow$$ Organism $$\rightarrow$$ Organs and organ systems $$\rightarrow$$ Tissue $$\rightarrow$$ Cell $$\rightarrow$$ Organelle $$\rightarrow$$ Molecule

Question 4

Which of the following is an example of a controlled experiment?

Accepted Answer

Comparing the growth of plants with and without fertilizer, keeping all other conditions the same.

Question 5

In a scientific experiment, what is the independent variable?

Accepted Answer

The variable that is altered or changed by the scientist.

Question 6

A researcher hypothesizes that a new drug lowers blood glucose levels. She gives the drug to one group of patients and a placebo to another, measuring their blood glucose after one week. What is the dependent variable in this experiment?

Accepted Answer

The blood glucose level measured after one week

Question 7

Which of the following best illustrates the concept of 'emergent properties' in biology?

Accepted Answer

A heart pumping blood, which is a function not present in individual heart cells alone

Question 8

Which of the following statements about the process of science is correct?

Accepted Answer

Data are observations recorded during an experiment.

Question 9

Which of the following is an example of artificial selection?

Accepted Answer

Farmers breeding cows that produce more milk over several generations.

Question 10

Which of the following best describes the flow of genetic information in a cell?

Accepted Answer

$$	ext{DNA} ightarrow 	ext{RNA} ightarrow 	ext{Protein}$$

Question 11

Which of the following is an example of how biology, technology, and society are interconnected?

Accepted Answer

The discovery of penicillin leading to the development of antibiotics, which improved public health.

Question 12

Which of the following best explains why the red panda's 'false thumb' is an example of the theme 'structure and function'?

Accepted Answer

The false thumb is a structure that allows the red panda to grasp and eat bamboo efficiently.

Question 13

Which of the following scenarios best demonstrates the cycling of matter and flow of energy in an ecosystem?

Accepted Answer

Sunlight is captured by plants, which are eaten by animals, and heat is released as a byproduct.

Question 14

A biologist is classifying a newly discovered species. Which hierarchical level comes directly above 'Genus' in the taxonomic classification?

Accepted Answer

Family

Question 15

Which of the following is NOT a property of all living things?

Accepted Answer

Ability to photosynthesize

Question 16

Which of the following best describes the role of insulin in maintaining homeostasis?

Accepted Answer

Insulin is secreted by the pancreas to lower blood glucose levels when they are high.

Question 17

Which of the following is an example of an observational study rather than a controlled experiment?

Accepted Answer

Recording the number of different bird species in a forest over a year.

Question 18

Which of the following best illustrates the concept of 'descent with modification' as described by Darwin?

Accepted Answer

All mammals have hair, but whales have evolved to have very little hair due to their aquatic environment.

Question 19

A scientist collects data on the heights of plants grown under different light conditions. Which step of the scientific process does this represent?

Accepted Answer

Recording data

Question 20

Which of the following is an example of interdependence of systems at the macroscopic scale?

Accepted Answer

The digestive system and circulatory system working together to distribute nutrients throughout the body.

Chapter 1: Biology – Exploring Life (Mini-Textbook Study Notes)

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