Golgi Apparatus Overview
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Questions and Answers

Microtubules are composed of the protein actin.

False

Intermediate filaments provide mechanical strength and resistance to shear stress.

True

Microfilaments are also known as tubulin filaments.

False

Microtubules are involved in determining the positions of membrane-enclosed organelles.

<p>True</p> Signup and view all the answers

Keratins are found in muscle cells.

<p>False</p> Signup and view all the answers

Microfilaments are responsible for muscle contraction.

<p>True</p> Signup and view all the answers

Lamin proteins provide structural support to the nuclear envelope.

<p>True</p> Signup and view all the answers

Intermediate filaments are thinner than microtubules.

<p>False</p> Signup and view all the answers

Cilia and flagella are made of microfilaments.

<p>False</p> Signup and view all the answers

Microtubules are not involved in separating chromosomes during cell division.

<p>False</p> Signup and view all the answers

What is the main function of water in the body?

<p>To help regulate body temperature</p> Signup and view all the answers

Which of the following is NOT a function of water in the body?

<p>Assisting in muscle growth</p> Signup and view all the answers

What is the role of electrolytes in the body?

<p>Allowing cells to function properly</p> Signup and view all the answers

Which part of the body does water help to moisten?

<p>Skin</p> Signup and view all the answers

Why are significant fatty quantities stored in the liver and adipose tissue?

<p>Because they are absorbed with dietary fat</p> Signup and view all the answers

What percentage of total cell mass does water account for in most cases?

<p>Around 70%</p> Signup and view all the answers

Which bodily fluids are formed by water?

<p>Semen and mucous</p> Signup and view all the answers

Why is water considered the most abundant molecule in cells and on Earth?

<p><strong>Because it serves as a natural solvent</strong></p> Signup and view all the answers

Which type of protein is responsible for protecting against foreign substances and disease-causing organisms?

<p>Defensive proteins</p> Signup and view all the answers

What is the main function of nucleic acids in cells?

<p>Storage and transmission of genetic information</p> Signup and view all the answers

Which type of sugar is found in RNA but not in DNA?

<p>Ribose</p> Signup and view all the answers

What type of bond holds together the sugar and phosphate molecules in the backbone of a nucleic acid?

<p>Covalent bond</p> Signup and view all the answers

Which molecule serves as a biological catalyst in cells?

<p>Enzymes</p> Signup and view all the answers

What is the main function of structural proteins like collagen?

<p>Support and shape</p> Signup and view all the answers

Which nucleotide base is found in RNA but not in DNA?

<p>Uracil</p> Signup and view all the answers

What is the role of membrane receptor proteins in cells?

<p>Signaling</p> Signup and view all the answers

What is the structural difference between DNA and RNA?

<p>Ribose sugar vs. deoxyribose sugar</p> Signup and view all the answers

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