301 Best Biology Questions and Answers (Q&A) - ProProfs Discuss

What forms the outer boundary of a cell and controls material moving in and out of the cell?

M. Pollock, Photographer
Answered: Feb 19, 2021

The substance that forms the outer boundary of a cell and controls material moving in and out of the cell is the plasma membrane. This plasma membrane serves as the border or link between the...Read More

6 Answers

389 views

How will brief heating (to 95°C) affect macromolecular structures in aqueous solution?

D. gray, Builder
Answered: Feb 19, 2021

What happens when you heat a macromolecular substance like protein to a temperature of 95°C is that its molecules begin to unfold or unwind. What this means is that the protein will begin to...Read More

4 Answers

387 views

Why are there only 45 different tRNA anticodons rather than 64 to match each of the mRNA codons?

D. gray, Builder
Answered: Feb 19, 2021

There are only 45 different tRNA anticodons because of what is known as wobble. While you would expect each tRNA anticodon to pair with its codon and an amino acid so that there could be 64 tRNA...Read More

4 Answers

386 views

Which event is unique to mitosis, but not meiosis?

C. Perez, Writer
Answered: Feb 19, 2021

There are certain events that occur in mitosis that are not the same for meiosis. For instance, in mitosis, chromosomes do not line up in pairs on the metaphase plate, they line independently....Read More

4 Answers

385 views

What is the function of the AGU on the loop of the tRNA?

T. Perez
Answered: Feb 12, 2021

The main function of the AGU on the loop is it would temporarily basepair with the codon of mRNA. Another thing that it will do is that it will attach to the amino acid. It will make sure that...Read More

3 Answers

383 views

Which bonds are created during the formation of the primary structure of a protein?

G. Roland, Professor
Answered: Feb 12, 2021

Peptide bonds are created during the formation of the core structure of a protein. The principal structure of a protein is the amino acid sequence. The unique sequence of amino acids merged by...Read More

4 Answers

379 views

What does the word heredity mean?

L. Brett, Sales Manager
Answered: Feb 18, 2021

Heredity can also be called inheritance, and it is the handing down of traits to descendants, either via asexual reproduction or sexual reproduction. The offspring cells or organisms procure the...Read More

4 Answers

376 views

What are some of the myths about Cellulose?

G. Roland, Professor
Answered: Feb 12, 2021

The following are myths about cellulose. The first is that cellulose insulation attracts mold and mildew when the boric acid added to it combats the development of mold and mildew organisms....Read More

4 Answers

376 views

Why is it that RNA can catalyze reactions but DNA cannot?

J. Shatner, Content writer
Answered: Feb 18, 2021

The sugar of RNA is much more reactive than the sugar of DNA. RNA is an acronym for ribonucleic acid, and it is a molecule made up of nucleotides, and it is found inside the cell structure. Each...Read More

4 Answers

373 views

What are Carbohydrates?

C. Perez, Writer
Answered: Feb 18, 2021

A carbohydrate is any naturally occurring sugar, starch, or cellulose that is a food source of energy for a plant or animal. Although there are different kinds of carbohydrates, they all contain...Read More

4 Answers

371 views

What is an organelle and its function?

E. Dixon
Answered: Feb 15, 2021

Organelles are specialized structures found inside cells. A typical body cell has different kinds of organelles, and they all work together to carry out specific life processes. Although each...Read More

4 Answers

368 views

How would you describe chromatin?

G. Roland, Professor
Answered: Feb 12, 2021

Chromatin is a compound of DNA and protein found in eukaryotic cells. Its primary purpose is to contain long DNA molecules into more compact, thicker structures, preventing the strands from...Read More

4 Answers

368 views

Which one of the following best represents an adaptation to increase the surface-to-volume ratio?

Computerwiz
Answered: Apr 20, 2024

E) the multilobed sacs in the lungs

1 Answer

368 views

How to define a population?

Cadewilkinson
Answered: Apr 20, 2024

Members of the same species living in the same place.

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1 Answer

368 views

What is one exception to the cell theory?

John Smith
Answered: Apr 20, 2024

Cells are highly complex and organized but are all enclosed by a physical barrier cell membrane.

1 Answer

367 views

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