AnswersRVACR EcologyCharacteristics of Life

Genetic Code Answers

2 verified answers1 views
1
Free Preview

Which is a component of the modern cell theory that was not part of the original cell theory?

A
All organisms are made of cells.
B
All cells are similar in composition and metabolic activities.
C
All cells come from preexisting cells.
D
A cell is the basic unit of structure and function for all living things.
2
Free Preview

Which statement best distinguishes plant cells and animal cells?

A
There are more ribosomes in animal cells than in plant cells.
B
Plant cells have more lysosomes than animal cells have.
C
Plant cells have large vacuoles, and animal cells do not.
D
The position of the nucleus in the cells is different in plants and animals.
3

Sucrose is made of which simple sugars?

A
glucose and fructose
B
fructose and galactose
C
galactose and cellulose
D
cellulose and glucose
4

Mitosis is important because it allows

A
new cells to replace old damaged cells.
B
new cells to repair old damaged cells.
C
old cells to self-repair when they become damaged.
D
existing cells to take over the function of damaged cells.
5

Drinking too much water during exercise can cause a condition in which the concentration of sodium in the blood is lower than normal. What immediate response would the blood cells have in this condition?

A
Cells swell as water moves into them.
B
Cells swell as water moves out of them.
C
Cells shrivel as water moves out of them.
D
Cells shrivel as water moves into them.
6

If the endoplasmic reticulum were removed from the cell, which organelle would not be able to function properly, and why?

A
mitochondria, because they rely on the ER as an energy source
B
ribosomes, because they receive proteins made by the ER
C
Golgi apparatus, because it packages proteins received from the ER
D
cytoplasm, because it relies on the ER for structural support
7

How does the cell wall protect a plant cell?

A
The cell wall protects the cell by providing support and maintaining the cell's shape.
B
The cell wall protects the cell by storing food so the plant doesn't run out.
C
The cell wall is thin and flexible, which allows the cell to be moved without harming the organelles.
D
The cell wall is on the inside of the cell and serves to contain the contents of the cell.
8

Unsaturated and saturated lipids exhibit different characteristics based on their structures. Which characteristic is unique to saturated fats?

A
forms covalent, carbon-to-carbon bonds
B
is a liquid at room temperature
C
contains the maximum number of hydrogen atoms
D
consists of fatty acids and a carboxyl group
9

During which process is ethanol produced?

A
lactic acid fermentation
B
alcohol fermentation
C
citric acid cycle
D
electron transport chain
10

During which stage of cellular respiration is glucose broken down into two molecules of pyruvic acid?

A
electron transport chain
B
glycolysis
C
Krebs cycle
D
acetyl CoA formation
11

Which are produced as a result of meiosis?

A
zygotes
B
chromosomes
C
tetrads
D
gametes
13

Which is an example of a lipid?

A
cholesterol
B
glycerol
C
glycogen
D
proteins
14

What happens to excess carbohydrates in animals?

A
They are stored as fat.
B
They are stored as protein.
C
They are stored in nucleic acids.
D
They are stored as sugar.
15

Which organisms in the chart can produce ATP by photosynthesis?OrganismCells contain chloroplastsAlgaeXAmoebas Mushrooms Oak treesXBermuda grassX

A
All of these organisms produce ATP by photosynthesis.
B
None of these organisms produce ATP by photosynthesis.
C
Only amoebas and mushrooms produce ATP by photosynthesis.
D
Only algae, oak trees, and Bermuda grass produce ATP by photosynthesis.
16

Which best describes what happens to ATP during photosynthesis?

A
ATP is produced and then used to produce glucose.
B
ATP is broken down and then not used again.
C
ATP is formed and remains unchanged in the chloroplast.
D
ATP is changed to ADP and then moved to the cytoplasm.
18

Which is required for sexual reproduction?

A
mitosis
B
binary fission
C
diploid cell production
D
meiosis

Did you find these answers helpful?