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Lelechka [254]
3 years ago
11

Please help me on this question.

Biology
1 answer:
Julli [10]3 years ago
6 0
Independent: The second group is not given the drug.

Dependent: Dr. Smith wants to examine weather a new drug increases the maze running performance of older rats.

Constants: Dr. Smith teaches two groups of older rats to find a piece of tasty rat chow in the maze.
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A cell being observed under a microscope has a cell wall, plasma membrane, ribosomes, and chromosomal material that is not found
serious [3.7K]

Answer:

Prokaryote/Bacteria.

Explanation:

The features of the cell which is mentioned in this question match with that of prokaryotic organisms like bacteria.

The salient features of a bacteria are mentioned as under:

1) Presence of nucleoid instead of nucleus: Bacteria do not have well defined nucleus like eukaryotes so their chromosomal material is freely scattered in the cytosol.

2) Plasma membrane: They have plasma membrane which surrounds their interior i.e. their cytosol and other organelles.

4) Cell wall: Outside their plasma membrane they have a rigid cell wall made up of peptidoglycan which provides them a specific shape.

3) Ribosomes: They have a lot of ribosomes in their cytosol.

7 0
4 years ago
Read 2 more answers
Is this statement True or False?
PtichkaEL [24]
This question is true
8 0
3 years ago
Why in nucleic acid replication one strand is ahead while the other strand is behind?
kvasek [131]

Answer:

Because the leading strand is synthesized continuously while the lagging strand is discontinuously synthesized.

Explanation:

Two DNA strands have opposite polarity, that is, the 5' end of one strand lies opposite to the 3' end of the other strand. However, DNA replication can occur in 5' to 3' direction only since the formation of phosphodiester bonds require the presence of nucleophile 3' OH to attack the 5' phosphate of an incoming deoxyribonucleotide.  

The problem is solved by the synthesis of the leading strand continuously and the synthesis of the lagging strand in a discontinuous manner. Lagging strand synthesis requires the formation of primers and their elongation to form Okazaki fragments that may have few hundreds to few thousands of nucleotides. Removal of primers from Okazaki fragments is followed by joining them together to make the long lagging strand. The discontinuous replication of the lagging strand makes the replication at the leading strand ahead of it.  

7 0
3 years ago
The synthesis of amino acids occurs in about 5 or 6 related families of amino acids. True or false?.
Andrei [34K]

This statement is true.

<h3>How many amino acids are synthesized?</h3>

For example, humans can only synthesize 11 of the 20 standard amino acids (a.k.a. non-essential amino acid), and in time of accelerated growth, histidine can be considered an essential amino acid.

<h3>Where does amino acid synthesis occur?</h3>

The process of making proteins is called translation and involves the step-by-step addition of amino acids to a growing protein chain by a ribozyme that is called a ribosome.

<h3>Is the amino group the 5 end?</h3>

The 5-prime (5') end of the polypeptide chain that has a nitrogen atom or a 'free amino group. '

Peptide bonds connect all of the amino acids of the chain together. (Norman, 7/22/09) When two or more amino acids are linked together, one end of the resulting molecule has a free amino group.

Learn more about amino acids here:

<h3 /><h3>brainly.com/question/21327676</h3><h3 /><h3>#SPJ4</h3>
4 0
2 years ago
In 3-5 sentences, explain why the saying, “you are what you eat” is factually correct.
bonufazy [111]
You are why you eat is a phrase that describes how eating affects your physical appearance and weight in general.

It motivates us to eat well and pay attention to what we eat.

It also discusses how, in order to appear fit, we must eat healthily.
3 0
3 years ago
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