Question 1

Which of the following statements best explains why ice floats on water?

Accepted Answer

Ice has a lower density than water.

Question 2

Which property of water allows the formation of droplets at the tip of leaves after rain?

Accepted Answer

Surface tension

Question 3

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

Accepted Answer

They dissociate completely in water.

Question 4

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 5

Which of the following correctly describes an organic molecule?

Accepted Answer

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

Question 6

When a hydroxyl group $$(-OH) is $$attached to a specific carbon backbone, what will be its product?

Accepted Answer

Alcohol

Question 7

Carbohydrases belong to which class of biomolecules?

Accepted Answer

Carbohydrates

Question 8

How do starch and chitin differ from each other?

Accepted Answer

All of these

Question 9

Which of the following statements about chemical bonding is correct?

Accepted Answer

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

Question 10

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

Accepted Answer

High electronegativity

Question 11

Halophiles are extremophilic microorganisms that can grow optimally at:

Accepted Answer

high salt concentration

Question 12

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

Accepted Answer

All of the above

Question 13

Which of the following is NOT an example of a covalent interaction?

Accepted Answer

Hydrogen bond

Question 14

Which of the following statements is true regarding noble gases and halogens?

Accepted Answer

Halogens are more reactive than noble gases

Question 15

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 16

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

Accepted Answer

Reproduction

Question 17

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

Accepted Answer

Photosynthesis

Question 18

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 19

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 20

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

Accepted Answer

Whales and sharks

General Chemistry and Biochemistry Fundamentals: Study Notes

Study Guide - Practice Questions

Study Guide - Flashcards