1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
kati45 [8]
3 years ago
15

5) A cell is placed in a solution.  If the cell is observed to shrink, the solution must be _________________ relative to the in

terior of the cell.
A) toxic
B) isotonic
C) hypotonic
D) Hypertonic
Question 6
The part of an enzyme that "fits" its substrate is called its __________ site.
A) active
B) promoter
C) operator
D) Repressor
Question 7
Consider the following two statements:   
(1)  " Energy can neither be created nor destroyed, but it can be changed in form."
(2)  "If energy changes form, the change is never 100% efficient."
A) These statements apply only to eukaryotic (higher) cells.
B) These statements are expressions of the 1st and 2nd energy laws.
C) These statements don't apply to any cells.
D) These statements are both false.

Question 8
The polymerase chain reaction (PCR) is a method of ________________.
A) making multiple identical copies of small amounts of DNA
B) mass-producing proteins
C) decoding the nucleotide sequence of a gene
D) speeding up the production of mRNA proteins
Question 9
The normal complement of sex chromosomes for a human male is ___________.
A) XXY
B) XY
C) XX
D) YY

Question 10
Leaves are green because ____________.
A) carotenoids absorb green light
B) carotenoids reflect green light
C) chlorophylls a and b reflect green light
D) chlorophylls a and b absorb green light

Question 11
The smaller unit molecules (monomers) which combine to form proteins and polypeptides are called ____________.
A) nucleotides
B) fatty acids
C) amino acids
D) Monosaccharides
Question 12
Cell membranes consist of _____________.
A) a complex carbohydrate webbing
B) a flexible sheet of protein
C) a double layer of phospholipids
D) a network of microfilaments and microtubules

Question 13
An allele is ____________.
A) a gene located at two different positions on the same chromosome
B) a sex cell
C) a gene found on different chromosomes (e.g., on chromosome numbers 1 and 5)
D) an alternate form of a gene
Question 14
An atom that has gained or lost electrons is referred to as _______________.
A) an isotope
B) an ion
C) an element
D) a molecule
Question 15
Enzymes, some hormones, and structural molecules like keratin and collagen are examples of ______________.
A) lipids
B) nucleic acids
C) proteins
D) Carbohydrates

Question 16
Which of the following is most likely to cause a cell to become cancerous?
A) premature apoptosis
B) cytokinesis
C) contact inhibition
D) mutation of a tumor supressor gene
Question 17
Meiosis differs from mitosis because _______________.
A) meiosis results in diploid daughter cells
B) DNA replicates before the start of meiosis
C) meiosis occurs all over the human body
D) meiosis involves two cell divisions
Question 18
Many human traits such as eye color and height are controlled by _______________.
A) incomplete dominance
B) polygenic inheritance
C) Mendel's laws
D) sex-linked inheritance
Question 19
A testable explanation of a broad range of related phenomena that is relied upon by scientists with a high degree of confidence is referred to as ________.
A) an act
B) a law
C) a dogma
D) a theory

Question 20
A visual display of metaphase chromosomes arranged by size, shape, and banding pattern is ______.
A) a genetic disorder
B) a centrosome
C) a karyotype
D) amniocentesis
Biology
1 answer:
erik [133]3 years ago
6 0

5. B) isotonic

6. D) Repressor

7. B) These statements are expressions of the 1st and 2nd energy laws

8. A) making multiple identical copies of small amounts of DNA

9. B) XY (not sure to be honest)

10. C) chlorophylls a and b reflect green light

11. C) amino acids

12. C) a double layer of phospholipids

13. A) a gene located at two different positions on the same chromosome

14. C) proteins

15 - 18 i dont know maybe 18 is A and 16 I C i think the others im not sure.

19. A) an act

20. C) a karyotype

You might be interested in
FIRST ANSWER GETS BRAINLIEST ASAP
Allushta [10]

Answer:

Photosynthesis Creates Carbohydrates

Photosynthesis requires sunlight, carbon dioxide and water to produce glucose. This simple sugar is a carbohydrate that combines with other sugars to form the plant's structure and stores energy for future use.

Explanation:

3 0
3 years ago
Identify the three main stages of translation. Check all that apply. elongation promotion termination initiation
irga5000 [103]

elongation

termination

initiation


5 0
3 years ago
Read 2 more answers
16. Why should the recessive phenotype be used first to determine the q squared value instead of the dominant phenotype to deter
podryga [215]

The recessive phenotype is used first to determine the q squared value because it is only expressed when h0m0zygous.

<h3>What is a recessive phenotype?</h3>

A recessive phenotype is a phenotype which expresses the recessive trait of a gene.

The recessive phenotype is always h0m0zygous for that triat to be expressed.

In the Hardy-Weinberg equilibrium equation, the allele and phenotype frequencies are given as follows:

  • p^2 + 2pq + q^2 = 1

where;

  • p^2 is the h0m0zygous dominant phenotype frequency
  • 2pq is the heterozygous phenotype frequency
  • q^2 is the h0m0zygous recessive phenotype frequency

Therefore, the recessive phenotype is used first to determine the q squared value because it is only expressed when h0m0zygous.

Learn more about recessive phenotype at: brainly.com/question/22117

8 0
2 years ago
The American Psychological Association is the only organization that can approve psychological research studies. Please select t
pogonyaev
The statement "The American Psychological Association is the only organization that can approve psychological research studies." is false.

6 0
3 years ago
Do you think humans will be able to genetically engineer future humans in your life time?
Vlad1618 [11]

✯Hello✯

↪  In our life time, I dont think so

↪  They will be making some robots but I think before any of this happens they will have to find a way to modify genes

↪  By modifying genes this could change people's hair and eye colour build etc

↪  This hasnt had any progress, but is sure to come in the future but I dont think unless there is a scientific revolution that humans will be engineered this way in our life span

❤Gianna❤

5 0
3 years ago
Read 2 more answers
Other questions:
  • An independent variable is?
    6·1 answer
  • ESTION 4 Air at higher elevations is ______ and loses much of its moisture as rainfall.
    7·1 answer
  • an animals internal body structures can either be coelomate aceolmate or pseudocoelomate this means they may or may not have
    8·1 answer
  • Oleander (Nerium oleander) is a common but poisonous ornamental shrub. All parts of the plant contain chemicals that inhibit the
    8·1 answer
  • How does the growing human population impact the earth's natural resources, and in which countries is this most prominent? what
    14·1 answer
  • What is the name of a syndrome that is the result of a defective protein
    7·1 answer
  • If a hawk weighs 3 lbs how much biomass would be needed of rabbits and snakes for a healthy ecosystem
    10·1 answer
  • A semi-permeable membranous sac contains a 4% NaCl, 96% water solution. This sac is placed into a beaker containing a 16% NaCl,
    6·1 answer
  • Explain why crossing-over is an important source of genetic variation. written response
    15·1 answer
  • All of the following are threats to biodiversity EXCEPT
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!