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4 years ago

Which of the following is true of kinesin?

1 answer:

3 0

Kinesins moving along microtubules usually carry cargo such as organelles and vesicles from the center of a cell to its periphery. Dyneins are important in sliding microtubules relative to one other during the beating of cilia and flagella on the surfaces of some eukaryotic cells.

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Protons orbit the nucleus.<br><br> True or False?

Alika [10]

False the nucleus is too small

8 0

4 years ago

bacteria culture starts with 400 bacteria and grows at a rate proportional to its size. After 4 hours, there are 9000 bacteria.

yawa3891 [41]

Answer:

A) $P = P_0 e^{rt}$

B) $19564$

C) $5.5$ or $6$ hours

Explanation:

A) The formula that can be used for bacteria after "t" hours is

$P = P_0 e^{rt}$

Where ,

$P$ represents the population after "t" hours

$P_0$ represents the initial population.

$r$ represents the rate of growth of population

$t$ represents the time taken by the population to grow

B) Here let us first find the rate of population growth.

$9000 = 400 * e^{r*4}\\3.11 = r* 4\\r = 0.778$

Thus, the population of bacteria after 5 hours

$P = 400 * e^{0.778 * 5} \\P = 400* 48.91\\P = 19564\\$

$30000 = 400 * e^{0.778 * t) \\\\4.317 = 0.778 * t\\t = 5.549\\or t= 5.5 or 6$

7 0

4 years ago

The enzyme that makes new strands of DNA only in one direction is:_______ primase

Wittaler [7]

Answer:

Option C

Explanation:

Primase synthesizes DNA polymerase through the initiation of synthesis of RNA primer. DNA polymerase is able to add nucleotides in only one direction towards the direction of replication fork Hence, it add to the chain only at 3’ end and build new strand from 5’ to 3’ end.

The 5’ to 3’ strand is the leading strand and is easy to build as 5’ to 3’ progresses towards the replication fork and DNA polymerase also move in the same direction

Hence, option C is correct

5 0

4 years ago

How do viruses differ from living things

klasskru [66]

Viruses are similar to living organisms because both contain hereditary material (RNA or DNA), and both reproduce. Viruses are different from living organisms because they do not use energy to grow, and do not use energy to respond to their surroundings.

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3 years ago

3.Some plants have structures or features that protect them from harm.

asambeis [7]

Answer:

Caterpillars that would eat the plant

Explanation:

8 0

3 years ago