biology

Question 1

Which of the following types of cells lacks a nucleus?

Accepted Answer

Bacteria

Question 2

Which of the following was Charles Darwin significant contribution to understanding both the unity and diversity of life

Accepted Answer

He proposed a mechanism to explain the process of evolution.

Question 3

Carbon has an atomic number of 6. How many electrons are located in its outer valence shell?

Accepted Answer

4

Question 4

Which two functional groups are always found in amino acids?

Accepted Answer

carboxyl and amino

Question 5

In the context of “science”, the term “theory” is used to describe:

Accepted Answer

explanations of experiments and hypotheses which are supported by a body

Question 6

a nucleic acid molecule is found to have 36% cytosine, 14% adenine, 36% guanine, and 14% thymine

Accepted Answer

DNA

Question 7

Simply put, an element is defined by the number of _____________ found in the _____________.

Accepted Answer

Protons, nucleus

Question 8

According to the lecture, the term “science” is best described as:

Accepted Answer

process of looking at the world by making observations and testing hypothes

Question 9

Testosterone and estradiol are male and female sex hormones, How do these molecules differ from each othe

Accepted Answer

have different functional groups attached to the same carbon skeleto

Question 10

The compound contains carbon, hydrogen, oxygen, nitrogen, and a trace amount of sulfur

Accepted Answer

A protein

Question 11

some cells come many different shapes and perform a variety different functions. This phenomenon is best explained by:

Accepted Answer

Differential gene expression

Question 12

Two atoms both have 11 protons in their nuclei. However they have different mass numbers. This is because they must have

Accepted Answer

Different numbers of neutron

Question 13

Which of the following large biological molecules will self-assemble into a bilayer when mixed with water?

Accepted Answer

phospholipids

Question 14

The number and location of electrons plays a significant factor in determining:

Accepted Answer

The reactivity (chemical behavior) of a particular atom

Question 15

Which of the following levels of biological “structural hierarchy” are correctly in order from smallest to largest?

Accepted Answer

Molecules → Organelles → Cells → Tissues

Question 16

Strong evidence in support of the common ancestry of all life comes from:

Accepted Answer

the existence of a nearly universal genetic code.

Question 17

Which element listed below is one of these top four found in the human body

Accepted Answer

carbon

Question 18

the fact that decomposers include both bacteria and fungi.

Accepted Answer

Elements

Question 19

Cells which contain a wide variety of organelles and have their genetic material surrounded by a nuclear membrane

Accepted Answer

Eukaryotic cells

Question 20

Based on our class discussion, which of these is most likely composed of the most “unsaturated” fats?

Accepted Answer

cellulose

Question 21

Chemical bonds in which electron pairs are “shared” are called:

Accepted Answer

Covalent bonds

Question 22

A nucleotide is composed of

Accepted Answer

a nitrogenous base, a phosphate group, and a pentose sugar

Questions 22