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Which of the following nitrogenous bases is classified as a purine?

Cytosine

Uracil

Adenine (correct)

Thymine

What is the structure of DNA described as?

Straight ladder

Single strand with no pairing

Double helix (correct)

Triple helix

During transcription, which base in RNA replaces thymine found in DNA?

Uracil (correct)

Guanine

Cytosine

Adenine

What type of sugar is found in RNA?

Ribose Signup and view all the answers

Which sequence represents the correct base pairing in DNA?

Guanine - Cytosine Signup and view all the answers

What is the primary function of ribosomes in a cell?

Synthesizing proteins Signup and view all the answers

What distinguishes prokaryotic cells from eukaryotic cells?

Lack of membrane-enclosed internal compartments Signup and view all the answers

What is the significance of magnification in microscopy?

It allows the observation of smaller objects. Signup and view all the answers

Which statement accurately reflects cell theory?

Cells are the basic units of life. Signup and view all the answers

What role does the cytoplasm play in a cell?

It provides a site for metabolic reactions. Signup and view all the answers

Which statement about plasma membranes is correct?

Glycoproteins are responsible for binding to substances the cell requires. Signup and view all the answers

What characterizes passive transport across the plasma membrane?

It allows the movement of substances down their concentration gradient. Signup and view all the answers

Which factor does NOT affect the rate of diffusion?

The pH level of the solution. Signup and view all the answers

Which type of molecules can passively diffuse through biological membranes?

Small non-polar molecules. Signup and view all the answers

How does temperature influence diffusion rates?

Higher temperatures increase molecular movement and diffusion rates. Signup and view all the answers

What is a defining feature of prokaryotic cells?

They have chromosomal DNA localized in a nucleoid. Signup and view all the answers

Which organelle is responsible for converting stored energy into ATP?

Mitochondrion Signup and view all the answers

What function does the nuclear envelope serve?

Separates DNA from the cytoplasm. Signup and view all the answers

Which structure is unique to plant cells compared to animal cells?

Central vacuole Signup and view all the answers

What is the role of ribosomes in eukaryotic cells?

Assemble amino acids into proteins. Signup and view all the answers

How do prokaryotic cells limit their size?

Due to their favorable surface area-to-volume ratio. Signup and view all the answers

Which of the following organelles is involved in detoxifying poisons?

Peroxisome Signup and view all the answers

What is the role of the endomembrane system in eukaryotic cells?

Modify, package, and transport lipids and proteins. Signup and view all the answers

What distinguishes plant cell walls from those of prokaryotic cells?

They are composed of cellulose. Signup and view all the answers

Which cellular structure is larger in eukaryotic cells compared to prokaryotic cells?

Nucleus Signup and view all the answers

What type of facilitated transport protein is specific to a single substance and changes shape to carry it across the membrane?

Carrier proteins Signup and view all the answers

Which term describes the movement of water from an area of high water concentration to an area of low water concentration?

Osmosis Signup and view all the answers

In which type of solution does water move into a cell due to lower osmolarity outside than inside?

Hypotonic Signup and view all the answers

What type of active transport utilizes ATP directly to move ions against their concentration gradient?

Primary active transport Signup and view all the answers

Which of the following processes involves the cell membrane surrounding and engulfing a particle?

Phagocytosis Signup and view all the answers

What is the function of aquaporins in a cell?

Specific transport of water Signup and view all the answers

Which type of transport involves moving substances against their concentration gradient without using ATP directly?

Secondary active transport Signup and view all the answers

What describes a solution with equal concentrations of solute and solvent inside and outside the cell?

Isotonic Signup and view all the answers

Which type of pump carries two different ions in the same direction across the membrane?

Symporter Signup and view all the answers

What term describes the combined effects of concentration gradients and electrical gradients on ion movement?

Electrochemical gradient Signup and view all the answers

Untitled Quiz

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Questions and Answers

Which of the following nitrogenous bases is classified as a purine?

What is the structure of DNA described as?

During transcription, which base in RNA replaces thymine found in DNA?

What type of sugar is found in RNA?

Which sequence represents the correct base pairing in DNA?

What is the primary function of ribosomes in a cell?

What distinguishes prokaryotic cells from eukaryotic cells?

What is the significance of magnification in microscopy?

Which statement accurately reflects cell theory?

What role does the cytoplasm play in a cell?

Which statement about plasma membranes is correct?

What characterizes passive transport across the plasma membrane?

Which factor does NOT affect the rate of diffusion?

Which type of molecules can passively diffuse through biological membranes?

How does temperature influence diffusion rates?

What is a defining feature of prokaryotic cells?

Which organelle is responsible for converting stored energy into ATP?

What function does the nuclear envelope serve?

Which structure is unique to plant cells compared to animal cells?

What is the role of ribosomes in eukaryotic cells?

How do prokaryotic cells limit their size?

Which of the following organelles is involved in detoxifying poisons?

What is the role of the endomembrane system in eukaryotic cells?

What distinguishes plant cell walls from those of prokaryotic cells?

Which cellular structure is larger in eukaryotic cells compared to prokaryotic cells?

What type of facilitated transport protein is specific to a single substance and changes shape to carry it across the membrane?

Which term describes the movement of water from an area of high water concentration to an area of low water concentration?

In which type of solution does water move into a cell due to lower osmolarity outside than inside?

What type of active transport utilizes ATP directly to move ions against their concentration gradient?

Which of the following processes involves the cell membrane surrounding and engulfing a particle?

What is the function of aquaporins in a cell?

Which type of transport involves moving substances against their concentration gradient without using ATP directly?

What describes a solution with equal concentrations of solute and solvent inside and outside the cell?

Which type of pump carries two different ions in the same direction across the membrane?

What term describes the combined effects of concentration gradients and electrical gradients on ion movement?

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