Question 1

Which of the following characteristics is present in both viruses and other living entities?

Accepted Answer

Reproduction

Question 2

Which of the following characteristics is NOT shared among all living organisms?

Accepted Answer

Photosynthesis

Question 3

Erwin Chargaff found that in DNA, the ratios of adenine (A) to thymine (T) and guanine (G) to cytosine (C) are equal. This is the best example of study at the ____ level in life's hierarchy.

Accepted Answer

molecular

Question 4

According to the theory of natural selection, which organisms are more likely to survive and reproduce?

Accepted Answer

organisms that are more adapted to the environment

Question 5

Which of the following pairs of organisms does NOT share a common ancestor?

Accepted Answer

Whales and sharks

Question 6

A controlled experiment is one in which all factors except the ______ are held constant.

Accepted Answer

independent variable

Question 7

Noble gases have full electron shells, while halogens readily gain an electron to fill their outermost shell. Which of the following statements is therefore true?

Accepted Answer

Halogens are more reactive than noble gases

Question 8

Which of the following options correctly includes a common use of radioactive isotopes in biological science?

Accepted Answer

All of the above

Question 9

Identify the correct statement about types of chemical bonding formed between atoms.

Accepted Answer

The type of chemical bonding depends on the difference in electronegativities between bonding atoms

Question 10

All of the following are examples of covalent interactions, EXCEPT:

Accepted Answer

Hydrogen bond

Question 11

Considering an ionic bond formation between a metal atom (M) possessing a solitary valence electron and a nonmetal atom (N) possessing seven valence electrons, which of the following statements accurately describes the electron transfer process?

Accepted Answer

N gains a single electron from M.

Question 12

For a hydrogen atom to form a hydrogen bond, the interacting atom must have which of the following characteristics?

Accepted Answer

High electronegativity

Question 13

Halophiles are extremophilic microorganisms that can grow optimally at:

Accepted Answer

high salt concentration

Question 14

Which of the following water properties can explain the formation of water droplets at the tip of leaves after rain?

Accepted Answer

Surface tension

Question 15

Why does ice float on water?

Accepted Answer

Ice has a lower density than water

Question 16

Which of the following statements is true about strong acids and bases?

Accepted Answer

They dissociate completely in water

Question 17

The human body regulates the pH levels of several body parts, including the vagina. Why is it important to maintain its slightly acidic pH?

Accepted Answer

To prevent the growth of harmful yeast and bacteria.

Question 18

Identify which of the following describes an organic molecule.

Accepted Answer

Molecules that contain hydrogen and carbon atoms which are covalently bonded to other molecules

Question 19

When a hydroxyl group is attached to a specific carbon backbone, what will be its product?

Accepted Answer

Alcohol

Question 20

How do starch and chitin differ from each other?

Accepted Answer

All of these

General Biology: Foundations, Chemistry, and Biomolecules Study Guide

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