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Mrrafil [7]
3 years ago
9

Review Questions

Biology
1 answer:
mezya [45]3 years ago
7 0

Answer:

6==. During spermatogenesis, four sperm result from each primary spermatocyte, which divides into two haploid secondary spermatocytes; these cells will go through a second meiotic division to produce four spermatids

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Two protein kinases, K1 and K2, function sequentially in an intracellular signaling pathway. If either kinase contains a mutatio
Korolek [52]

Answer:

The order must be K2→K1, since the permanently active K1 allele (K1a) is able to propagate the signal onward even when its upstream activator K2 is inactive (K2i). The reverse order would have resulted in a failure to signal (K1a→K2i), since the permanently active K1a kinase would be attempting to activate a dead K2i kinase.

Explanation:

  • You characterize a double mutant cell that contains K2 with type I mutation and K1 with type II mutation.
  • You observe that the response is seen even when no extracellular signal is provided.
  • In the normal pathway, i f K1 activat es K2, we expect t his combinat ion of two m utants to show no  response with or without ext racell ular signal. This is because no matt er how active K1 i s, it would be unable to  act ivate a mutant K2 that i s an activit y defi cient. If we reverse the order, K2 activating K1, the above  observati on is valid. Therefore, in the normal signaling pathway, K2 activates K1.
7 0
3 years ago
Provides energy in the form of atp endoplasmic reticulum (er) for a storage reservoir and transport channel within the cell?
almond37 [142]
<span>This form of providing energy for the storage and transport within the cell is called as Mitochondria. The energy production is done threw respiration and help regulate the cellular metabolism. Mitochondria are organelle that is present in the cytoplasm, not nucleus. Exercising your body can boost the density of mitochondria.</span>
6 0
3 years ago
Joseph Priestly discovered that plants give off, or release_____
sp2606 [1]

Answer:

oxygen

Explanation:

photosenthsesis

4 0
3 years ago
What would be the complementary RNA bases for this strand of DNA: ATTGAC
Fiesta28 [93]

Answer:

UAACUG

Explanation:

rna contains Uracil instead of Thymine.

3 0
2 years ago
1) Which organelle of a cell contains its DNA? a) Mitochondria b) Membrane c) Cytoplasm d) Nucleus​
mixas84 [53]
D. Nucleus

Please give brainliest answer <3
8 0
2 years ago
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