Bio Question

[hope_to_match]

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does anyone know what this 'multiplication rule' is for cleavage? I thought it goes:
2 cells--> 4 cells--> 8 cells---> 16 cells ----> 32 cells. Therefore I answered 4 mitotic cleavages. But I dont understand why 5 is the answer here and how this 'multiplication rule' applies to cleavage. Can someone help? Thanks!

 

[Illfavor]

You skipped one.

1-2-4-8-16-32

 

[mostprecious]

You start with 1 cell (zygote). Do not consider sperm+egg = 2 cells! Once they merge, they fuse their genes and become 1 cell. Therefore, 1 -> 2 ->4 -> 9 -> 16 -> 32. Count the arrows. Five cleavages.

 

[hope_to_match]

You skipped one.

1-2-4-8-16-32

so it starts with one cell? Thanks...it makes sense but i never learned about that..i remember prof. always saying '2-4-...'

 

[hope_to_match]

what about this one? Isn't achiever contradicting Bootcamp? I thought no nucleic acids (therefore no nucleotides) are observed..why is the answer proteins? I thought amino acids are observed and therefore proteins..I am so confused..Please help me...

BOOTCAMP:



ACHIEVER:

 

[LazyP]

what about this one? Isn't achiever contradicting Bootcamp? I thought no nucleic acids (therefore no nucleotides) are observed..why is the answer proteins? I thought amino acids are observed and therefore proteins..I am so confused..Please help me...

BOOTCAMP:



ACHIEVER:

Here is how I looked at it, amino acids are the basic units of proteins and nucleotides that of nucleic acids. Thus the simple basic units were observed but not the complex molecules they are part of (which took millions of years in nature to even produce given they bonded correctly to make a functional unit)

 

[hope_to_match]

Here is how I looked at it, amino acids are the basic units of proteins and nucleotides that of nucleic acids. Thus the simple basic units were observed but not the complex molecules they are part of (which took millions of years in nature to even produce given they bonded correctly to make a functional unit)

based on your reasoning bootcamp is wrong? because they say that nucleic acids are NOT observed..thats why im confused

 

[LazyP]

based on your reasoning bootcamp is wrong? because they say that nucleic acids are NOT observed..thats why im confused

Never said nucleic acids are observed, said the units which make up the nucleic acids (nucleotides) are observed. Its similar to proteins, amino acids are observed but not proteins. The nucleotides and amino acids are basic simple units whereas proteins and nucleic acids are too complex to be observed. Hope that clears it up a little.

 

[hope_to_match]

Never said nucleic acids are observed, said the units which make up the nucleic acids (nucleotides) are observed. Its similar to proteins, amino acids are observed but not proteins. The nucleotides and amino acids are basic simple units whereas proteins and nucleic acids are too complex to be observed. Hope that clears it up a little.

oh im sorry i misread your earlier answer..thanks! i get it now

 

[Jordwin]

LazyP is right, to my knowledge. Nucleotides such as adenine, guanine, cystosil, or thymine were seen, but
Nucleic acids- DNA and RNA - were not. Nucleotides make up nucleic acids, but are not the same as nucleic acids.