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 natural selection theory, who is more likely to survive and reproduce?

Accepted Answer

organisms that are more adapted to the environment

Question 5

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

Accepted Answer

Whales and sharks

Question 6

A controlled experiment is simply 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 the 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 electronegativity between bonding atoms

Question 10

Use the electronegativity values to choose the pair of elements that will most likely form a non-polar covalent bond.

Accepted Answer

Chlorine and Chlorine

Question 11

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

Accepted Answer

Hydrogen bond

Question 12

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 13

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

Accepted Answer

High electronegativity

Question 14

Halophiles are extremophilic microorganisms that can grow optimally at:

Accepted Answer

high salt concentration

Question 15

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

Accepted Answer

Surface tension

Question 16

Why does ice float on water?

Accepted Answer

Ice has a lower density than water

Question 17

Which of the following answer choices correctly shows the hydration shell forming around sodium and chloride ions when sodium chloride (NaCl) is dissolved in water?

Accepted Answer

b

Question 18

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

Accepted Answer

They dissociate completely in water

Question 19

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 20

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

General Biology 1 Midterm Study Guide – Core Concepts and Practice

Study Guide - Practice Questions

Study Guide - Flashcards