WELCOME TO THIS GREAT EDUCATIONAL BLOG

Welcome to my Pre-Nursing Exam Prep blog. I hope it will help you prepare very well for the Pre-NLN entrance exam, popularly known as the PAX exam. This is one of the entrance exams required by some schools for those who want to pursue careers in the nursing field in the USA. I will attempt to break down the review materials into manageable parts so that you can systematically and efficiently prepare for the test with less stress. I will guide you to prepare for the entire content of the test. Hopefully, you will be able to pass after going through these series.


BEST OF LUCK!


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A 12-DAY APPROACH TO ACE THE EXAM

SCIENCE REVIEWThe topics that are generally covered in the test have been grouped into twelve instructional modules below. You will be tested only on the basic concepts of physics, chemistry and biology. Click on science topics and select any of the topics listed in the module to review.

Lesson 1:

Basic structure of atom

Types of tissues

Lesson 2:

Movement of substances across the cell membrane

Acids and bases, pH scale

Carbohydrates, proteins, lipids and nucleic acids

Lesson 3:

Basic structure of the eye

Basic structure of the ear

Nervous system

Lesson 4:

Circulatory system

Introduction to mechanics (motion/forces)

Electrical circuits

Lesson 5:

Balancing chemical equations and writing formulas

Essentials of photosynthesis and respiration

Classifying organic compounds

Magnetism

Electromagnetism

Lesson 6:

Interpretation of graphs and pictograms

Analyzing and making conclusions from experiments

Data analysis

Lesson 7:

Endocrine system

Digestive system

Genitourinary system

Lesson 8:

Reproduction in mammals

Basic parts of a flower

Reproduction in plants (the process of pollination

Genetics

Lesson 9:

Modes of heat transfer

Calculating heat energies and phase diagrams

Temperature conversions (Kelvin, Celsius, Fahrenheit)

Lesson 10:

Gas laws (Boyle, Charles, Gay-Lussac)

Types of energy (Potential, kinetic, etc…..)

Chemical bonds, equilibrium and equilibrium constants

Mixtures, types of solutions, solubility

Lesson 11:

Concepts of the food pyramid, food web and food chain

Light (diffraction, refraction, reflection, dispersion)

Basic concepts on waves

Sound waves

Catalyst and enzymes

Lesson 12:

Symbiosis

Ecology

The Electroscope

Radioactivity and half-life Tropism

Tropism

Saturday, March 15, 2025

WHAT IS A SCATTER PLOT?

 What is a scatter plot? 

Scatter plot is a mathematical technique that is used to represent data. Scatter plot is also called a Scatter Graph or Scatter Chart. It uses dots to describe two different numeric variables. The position of each dot on the horizontal and vertical axis indicates values for an individual data point. A scatter plot helps find the relationship between two variables. This relationship is referred to as a correlation.



Types of Scatter Plot

 Based on the correlation, scatter plots can be classified as follows.

  • Scatter Plot for Positive Correlation
  • Scatter Plot for Negative Correlation
  • Scatter Plot for Null Correlation (No correlation)

Scatter Plot for Positive Correlation

A scatter plot with increasing values of both variables can be said to have a positive correlation. In other words, the two variables change in the same direction. As the x-variables increase, the y-variables also increase. For example, as the temperature gets more and more higher in the summer, the amount of ice cream eaten by people increases.



Scatter Plot for Negative Correlation

A scatter plot with an increasing value of one variable and a decreasing value for another variable can be said to have a negative correlation. In other words, as the x-values increase, the y-values decrease.


Scatter Plot for Null Correlation

A scatter plot with no clear increasing or decreasing trend in the values of the variables is said to have no correlation. Here the points are distributed randomly across the graph. 


QUESTION FOR TYHE DAY


Correct answer: Linear association with bivariate data with negative correlation.

Explanation:

We are comparing two variables, one on the 𝑥-axis and the other on the 𝑦-axis. So, this is bivariate data.
We can draw a line coming as close as possible to all points. This is known as the line of best fit or trend line, and it shows us that a linear association is a good fit for the data. As we increase the independent variable, 𝑥-axis, there is a decrease in the dependent variable, 𝑦-axis. A decrease in 𝑦 values as we increase 𝑥 values means that there is a negative correlation between the variables. So, the graph shows a linear association with bivariate data with negative correlation.

Monday, April 1, 2024

ANSWERS TO QUESTIONS OF THE DAY - APRIL 1, 2024

 1. Which of the following structures is not found in a prokaryotic cell?

A. Ribosomes 

B. Plasma membrane 

C. Nucleus 

D. Cell wall 

 

2. Which structure helps transport substances in the cell? 

A. vesicles 

B. vacuole 

C. lysosomes 

D. cytoskeletal fibers. 

 

3. mRNA Leaves the nucleus through the  

A. chromatin 

B.  nuclear pores  

C. nucleolus  

D. chromosomes. 

 

4. How is the nucleus the control center of the cell? 

A. By producing signaling molecules. 

B. By modifying all biomolecules into energy. 

C. By housing DNA 

D. By synthesizing energy in the form of ATP. 

 

5. Which part of an animal cell would breakdown harmful bacteria which has entered the cell? 

A. lysosomes 

B.  Mitochondria 

C. smooth endoplasmic reticulum  

D. rough endoplasmic reticulum 

 

6. When the cell is not dividing, DNA is seen within as ________________ ? 

A. chromatin 

B. the nucleolus 

C. a double Helix strand 

D. chromosomes 

 

7. If a poison specifically destroyed the ribosomes of a cell, what is the main reason that the cell would die?  

A. the cell would not be able to digest any unwanted bacteria. 

 B. there would be no more nutrients transported into the cell.  

C. the cell would not be able to make any new proteins. 

 D the cell would no longer be able to move. 

 

8. Which statement below does not apply to cytoskeleton? 

A. In animals, it is used to support the shape 

 B. anchors organelles but allows them to move 

 C. network of protein fibers within the cytoplasm.  

D. examples are actin, microtubules and vacuoles 


9. Compared to prokaryotic cells, which are the following is true about eukaryotic cells. 

A.  eukaryotic cells are smaller. 

B. eukaryotic cells have no plasma membrane 

C. eukaryotic cells have a nucleus. 

 D eukaryotic cells have a capsule. 

 

10. If eukaryotic cells lacked Golgi apparatus, which of the following will be true? 

A.  It could not package proteins. 

B.  It would not have genetic information. 

C.  It could not maintain its shape.  

D.  It could not make energy. 

PRACTICE QUESTIONS FOR THE DAY-APRIL 1, 2024

ANSWERS ARE PROVIDED IN THE NEXT POST

1. Which of the following structures is not found in a prokaryotic cell?

A. Ribosomes 

B. Plasma membrane 

C. Nucleus 

D. Cell wall 

 

2. Which structure helps transport substances in the cell? 

A. vesicles 

B. vacuole 

C. lysosomes 

D. cytoskeletal fibers. 

 

3. mRNA Leaves the nucleus through the  

A. chromatin 

B.  nuclear pores  

C. nucleolus  

D. chromosomes. 

 

4. How is the nucleus the control center of the cell? 

A. By producing signaling molecules. 

B. By modifying all biomolecules into energy. 

C. By housing DNA 

D. By synthesizing energy in the form of ATP. 

 

5. Which part of an animal cell would breakdown harmful bacteria which has entered the cell? 

A. lysosomes 

B.  Mitochondria 

C. smooth endoplasmic reticulum  

D. rough endoplasmic reticulum 

 

6. When the cell is not dividing, DNA is seen within as ________________ ? 

A. chromatin 

B. the nucleolus 

C. a double Helix strand 

D. chromosomes 

 

7. If a poison specifically destroyed the ribosomes of a cell, what is the main reason that the cell would die?  

A. the cell would not be able to digest any unwanted bacteria. 

 B. there would be no more nutrients transported into the cell.  

C. the cell would not be able to make any new proteins. 

 D the cell would no longer be able to move. 

 

8. Which statement below does not apply to cytoskeleton? 

A. In animals, it is used to support the shape 

 B. anchors organelles but allows them to move 

 C. network of protein fibers within the cytoplasm.  

D. examples are actin, microtubules and vacuoles 


9. Compared to prokaryotic cells, which are the following is true about eukaryotic cells. 

A.  eukaryotic cells are smaller. 

B. eukaryotic cells have no plasma membrane 

C. eukaryotic cells have a nucleus. 

 D eukaryotic cells have a capsule. 

 

10. If eukaryotic cells lacked Golgi apparatus, which of the following will be true? 

A.  It could not package proteins. 

B.  It would not have genetic information. 

C.  It could not maintain its shape.  

D.  It could not make energy.